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Marta_Voda [28]
2 years ago
9

Help me please i need to go to sleep.

Mathematics
1 answer:
irakobra [83]2 years ago
7 0

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.

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