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Neha wrote $3 x (2 x - 7) = 6 x^{2} - 7$ . What is the correct product?

Class 8Multiplying PolynomialsAlgebra

A $6 x^{2} - 21$
B $6 x - 21 x$
C $6 x^{2} + 21 x$
D $6 x^{2} - 21 x$

Step-by-Step Solution

3 x

must multiply both terms:

3 x \cdot 2 x = 6 x^{2}

and

3 x \cdot (- 7) = - 21 x

. Neha did not multiply the second term.

Answer: D)

6 x^{2} - 21 x

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