Trigonometry Examples

${(4 x + y)}^{7}$

Step 1

Use the Binomial Theorem.

${(4 x)}^{7} + 7 {(4 x)}^{6} y + 21 {(4 x)}^{5} y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2

Simplify each term.

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Step 2.1

Apply the product rule to $4 x$ .

$4^{7} x^{7} + 7 {(4 x)}^{6} y + 21 {(4 x)}^{5} y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.2

Raise $4$ to the power of $7$ .

$16384 x^{7} + 7 {(4 x)}^{6} y + 21 {(4 x)}^{5} y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.3

Apply the product rule to $4 x$ .

$16384 x^{7} + 7 (4^{6} x^{6}) y + 21 {(4 x)}^{5} y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.4

Raise $4$ to the power of $6$ .

$16384 x^{7} + 7 (4096 x^{6}) y + 21 {(4 x)}^{5} y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.5

Multiply $4096$ by $7$ .

$16384 x^{7} + 28672 x^{6} y + 21 {(4 x)}^{5} y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.6

Apply the product rule to $4 x$ .

$16384 x^{7} + 28672 x^{6} y + 21 (4^{5} x^{5}) y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.7

Raise $4$ to the power of $5$ .

$16384 x^{7} + 28672 x^{6} y + 21 (1024 x^{5}) y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.8

Multiply $1024$ by $21$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 35 {(4 x)}^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.9

Apply the product rule to $4 x$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 35 (4^{4} x^{4}) y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.10

Raise $4$ to the power of $4$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 35 (256 x^{4}) y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.11

Multiply $256$ by $35$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 35 {(4 x)}^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.12

Apply the product rule to $4 x$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 35 (4^{3} x^{3}) y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.13

Raise $4$ to the power of $3$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 35 (64 x^{3}) y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.14

Multiply $64$ by $35$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 2240 x^{3} y^{4} + 21 {(4 x)}^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.15

Apply the product rule to $4 x$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 2240 x^{3} y^{4} + 21 (4^{2} x^{2}) y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.16

Raise $4$ to the power of $2$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 2240 x^{3} y^{4} + 21 (16 x^{2}) y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.17

Multiply $16$ by $21$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 2240 x^{3} y^{4} + 336 x^{2} y^{5} + 7 (4 x) y^{6} + y^{7}$

Step 2.18

Multiply $4$ by $7$ .

$16384 x^{7} + 28672 x^{6} y + 21504 x^{5} y^{2} + 8960 x^{4} y^{3} + 2240 x^{3} y^{4} + 336 x^{2} y^{5} + 28 x y^{6} + y^{7}$