Question

If s(x) = x - 7 and t(x) = 4x7 - X+3, which expression is equivalent to (tºs)(x)?

4(x - 72 - x - 7+3
4(x - 72 -(x-7) + 3
(4x²-x+3)-7
(4x? – x+3)(x-7)​

Answer 1

4(x - 7)² - (x - 7) + 3

Explanation:

`s(x)=x-7,\ t(x)=4x^2-x+3\\\\(t\circ s)(x)=t\bigg(s(x)\bigg)-\text{exchange x to }\ s(x)=x-7:\\\\(t\circ s)(x)=4(x-7)^2-(x-7)+3`