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Basic Math Examples
23⋅(−18a+21b)+(−13)(15a+12b)
Step 1
Factor 13 out of each term.
13⋅(2(−18a+21b)−(15a+12b))
Step 2
Apply the distributive property.
13⋅(2(−18a)+2(21b)−(15a+12b))
Step 3
Multiply −18 by 2.
13⋅(−36a+2(21b)−(15a+12b))
Step 4
Multiply 21 by 2.
13⋅(−36a+42b−(15a+12b))
Step 5
Apply the distributive property.
13⋅(−36a+42b−(15a)−(12b))
Step 6
Multiply 15 by −1.
13⋅(−36a+42b−15a−(12b))
Step 7
Multiply 12 by −1.
13⋅(−36a+42b−15a−12b)
Step 8
Subtract 15a from −36a.
13⋅(−51a+42b−12b)
Step 9
Subtract 12b from 42b.
13⋅(−51a+30b)
Step 10
Step 10.1
Factor −3 out of −51a+30b.
Step 10.1.1
Factor −3 out of −51a.
13⋅(−3(17a)+30b)
Step 10.1.2
Factor −3 out of 30b.
13⋅(−3(17a)−3(−10b))
Step 10.1.3
Factor −3 out of −3(17a)−3(−10b).
13⋅(−3(17a−10b))
13⋅(−3(17a−10b))
Step 10.2
Remove unnecessary parentheses.
13⋅−3(17a−10b)
13⋅−3(17a−10b)
Step 11
Combine 13 and −3.
−33(17a−10b)
Step 12
Divide −3 by 3.
−1⋅(17a−10b)