What is the value of the expression below when x=4?
7x^2+8x−7
2 answers:
Answer:
137
Step-by-step explanation:
when x=4 , We substitute in the above equation
(7 x 4²)+(8x4)-7 = 112+25 =137
Answer : 137
Explanation: basically you plug 4 into the x spots so; 7(4)^2 + 8(4) -7
=7(16) + 8(4) -7
= 112 + 32 - 7
= 144 -7
= 137
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