Question

$7x\times (-5yz)\times 2xz$ = ___

• A. $70xyz$
• B. $15x^2$$z^2-4yz$
• C. $-70xyz$
• D. $-70x^{2}y{z}^2$

Answer 1

The correct option is D

$-70x^{2}y{z}^2$

When we multiply monomials, we first multiply the coefficients and then multiply the variables by adding the exponents. This will always give a monomial.

On multiplying $x$ with $x$, its power is raised to 2; on multiplying $z$ with $z$ its power is also raised to 2. Also, multiplying all the coefficients, we get $-70$.

Therefore the answer is $-70x^{2}y{z}^2$.