f(x-3) = 2x²+7x+20 maka f(x)= ?

jwab


f(x -3)= 2x^2 + 7x + 20

f(x)= 2 (x + 3)^2  + 7(x + 3) + 20

f(x) = 2 (x^2 + 6x + 9)  + 7x + 21 + 20

f(x)=  2x^2 + 12x + 18 + 7x + 41

f(x)= 2x^2 + 19x + 59

f(x-3) = 2x²+7x+20

misal u = x-3 maka x = u+3
f(u) = 2(u+3)²+7(u+3)+20
f(u) = 2(u²+6u+9)+7u+21+20
f(u) = 2u²+12u+18+7u+41
f(u) = 2u²+19u+59
maka,
f(x) = 2x²+19x+59

semoga membantu
ㅡ :)