1. diketahui f(x)= -4x+7 berapa nilai f(-2)? 2. jika f(x) 5x+4, berapa nilai dari f(2a-1)?

1. f(-2) = -4(-2)+7 = 8+7 = 15

2. f(2a-1) = 5(2a-1)+4
= 10a-5+4
= 10a-1

1. f(x) = -4x + 7
f(-2) = -4×(-2) + 7
= 8 + 7
f(-2) = 15

2. f(x) = 5x + 4
f(2a-1) = 5(2a-1) + 4
= 10a-5+4
f(2a-1) = 10a - 1