What is (9a+15)-(9a-12) ?

The solution to (9a+15)-(9a-12) is 27

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simplify (9a+15)-(9a-12)

simplify

(9 a + 15) - (9 a - 12)

27

Solution steps

(9 a + 15) - (9 a - 12)

Apply rule:

(a) = a

(9 a + 15) = 9 a + 15

= 9 a + 15 - (9 a - 12)

Apply the distributive law:

- (a - b) = - a + b

- (9 a - 12) = - 9 a + 12

= 9 a + 15 - 9 a + 12

Group like terms

= 9 a - 9 a + 15 + 12

Add similar elements:

9 a - 9 a = 0

= 15 + 12

15 + 12 = 27

= 27

4 x y - 8 x y^{2} - 12 x y^{3}

\frac{( 8 x ^{3} + 13 x ^{2} + 36 x + 84 )}{( x + 2 )}

5 + 16

1^{100}

- 0. 5^{3}