Question

Selesaikan dengan melengkapi kuadrat
3-4x^2=-11x

Answer 1

-4x2 +11x + 3 = 0
(4x - 1 ) ( -x - 3) = 0
4x-1=0 ---> x = 1/4
-x - 3 = 0 --> x = 3

Answer 2

4x²-11x = 3
x²-11/4 x = 3/4
x²-11/4 x + (11/8)² = 3/4 + (11/8)²
(x-11/8)² = 169/64
x-11/8 =+ 13/8
x=11/8+13/8
x1=11/8 + 13/8 =24/8=3
x2=11/8-13/8 =-2/8=-1/4