Question

bantu jawab kak segera​

Answer 1

Jawaban:

7. x²=9x

x²-9x=0

x(x-9)=0

x=0 dan x=9

8. 9x²=36

9x²-36=0

(3x)²-6²=0

(3x+6)(3x-6)=0

x= -2 dan x=2

9. 12x-9=3x²

3x²-12x+9=0

⅓(3x-9)(3x-3)=0

(x-3)(3x-3)=0

x=3 dan x=1

10. -2x²+12x-18=0

2x²-12x+18=0

½(2x-6)(2x-6)=0

(x-3)(2x-6)=0

x=3

11. (2x+3)²=(x-2)²

2x+3=x-2

x= -5

12. (2x-1)²-(x+1)(x-1)=6

2x²-4x+1-(x²-1)-6=0

x²-4x-4=0

x1,2= (-b±√(b²-4ac))/2a

=(4±√(16+16))/2

=(4±√32)/2

=(4±4√2)/2

=2±2√2

x=2+2√2 dan x=2-2√2

SEMOGAA MEMBANTUUU :')