f(x)=2x²+7x-15
f(3) = 2(3)² + 7(3) -15
= 18 + 21 - 15
= 18 + 6
= 24
jadi bayangan x = 3 adalah y = 24
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f(x)=2x²+7x-15
f(3) = 2(3)² + 7(3) -15
= 18 + 21 - 15
= 18 + 6
= 24
jadi bayangan x = 3 adalah y = 24