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Factor x ^ 3 - 4x ^ 2 + 7x - 28 by grouping. What is the resulting expression?

O (x ^ 2 + 7)(x - 4)

O (x ^ 2 - 7)(x + 4)

O (x ^ 2 + 4)(x - 7)

O (x ^ 2 - 4)(x + 7)

Sagot :

Answer:

A

Step-by-step explanation:

x³ - 4x² + 7x - 28

= x²(x - 4) + 7(x - 4)

= (x - 4)(x² + 7)

= A