Question

Help me please i need to go to sleep.

Answer 1

Answer:

149

Step-by-step explanation:

To find the value of f(-7), we will simply substitute x = -7 in the function. Given that we have a function of:

$\displaystyle{f(x)=3x^2+2}$

Substitute in x = -7:

$\displaystyle{f(x)=3(-7)^2+2}$

Recall that by squaring the negative number will always result in positive number:

$\displaystyle{f(-7)=3\cdot 49+2}\\\\\displaystyle{f(-7)=147+2}\\\\\displaystyle{f(-7)=149}$

Therefore, the value of f(-7) will equal to 149.