SAT Math Practice Question #34904 - SATify | SATify

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SAT Math Practice Question #34904 - SATify | SATify

#34904

expressions

algebra

hard

90 sec

Which expression is equivalent to $(x^{2} + 3 x)^{2} + (x - 2) (x + 2) - (x^{4} + 9 x^{2})$ ?

A.

$6 x^{3} + x^{2} - 4$

B.

$6 x^{3} + 19 x^{2} - 4$

C.

$6 x^{3} - 4$

D.

$x^{2} - 4$