Question

The product of 2/5a^2x and -1/5x^2a is
A. -1/5a^3x^3
B. 1/5a^3x^3
C. -2/25a^3x^3

Answer 1

Breakdown of the parts:

$\frac{2}{5} \times -\frac{1}{5} = -\frac{2}{25}$

$a^2 \times a^1 = a^{2+1} = a^3$

$x \times x^2 = x^{1 + 2} = x^3$

$\dfrac{2}{5} a^{2}x \times -\dfrac{1}{5} x^{2}a = - \dfrac{2}{25} a^3x^3$
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Answer: C
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