B) -12x³ + 28 x².Step-by-step explanation:
Given : -4x²(3x − 7).
To find : Simplify the expression
Solution : We have given that
-4x²(3x − 7).
Distribute -4x² over 3x − 7.
-4x² (3x) - -4x²( 7).
-12x³ + 28 x².
Therefore, B) -12x³ + 28 x².
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step-by-step explanation: