SAT Math Practice Question #39144 - SATify | SATify

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SAT Math Practice Question #39144 - SATify | SATify

#39144

operations

simplification

expressions

polynomials

algebra

hard

75 sec

Calculator OK

Simplify the expression $(12 m^{4} - 5 m^{2} + 8) - (3 m^{4} + 2 m^{2} - 1)$ .

A.

$9 m^{4} - 7 m^{2} + 7$

B.

$9 m^{4} - 7 m^{2} + 9$

C.

$15 m^{4} - 3 m^{2} + 7$

D.

$15 m^{4} - 3 m^{2} + 9$