Question

If f(x) = 7x²-3 and g(x) = 5x, which expression is equivalent to [go f](2)?

Answer 1

An expression is defined as a set of numbers, variables, and mathematical operations. The correct expression is B.

What is an Expression?

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

The expression that is equivalent to (f·g)(2) is,

f(x) = 7x²-3

g(x) = 5x

(g·f)(x) = g(f(x)) = 5(7x²-3)

                       = 5(7·2² - 3)

Hence, the correct expression is B.

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