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f (-2) = 2x+5
= 2 ( -2 ) + 5
= -4 + 5
= 1
f (2) = 2x + 5
= 2 ( 2 ) + 5
= 4 + 5
= 9
maka,
f(-2) + 4 f (-2) ⇒ 1 + 4 ( 9 )
= 1 + 36
= 37
semoga benar ya... ^^^
f(-2) = 2(-2)+5
f(-2) = -4+5
f(-2) = 1
kemudian kita harus mencari f(2)
f(2) = 2(2)+5
f(2) = 4+5
f(2) = 9
jadi
f(-2)+4 f(2)
= 1 + 4(9)
= 1 + 36
= 37
jadi nilai dari f(-2)+4 f(2) adalah 37