Question

Nomor 2,4,6,8,10 aja
makasih banyak yg udh jawab

Answer 1

2.(x+8)(x-5)=x(x-2)
(x+8)(x-5)=x^2-2x,.. x^2+8x-5x-40=x^2-2x
10x-5x-40=0
5x=40
x=8
4.(x+4)(x+2)=(x+3)(x+5)
x^2+4x+2x+8=x^2+3x+5x+15,,, 6x+8=8x+15
8=2x+15 ,, 2x=8-15 
2x=-7 x=-3,5
6.(y+4)(y-10)=(y+2)^2
y^2+4y-10y-40=y^2+4y+4,,      -6y-40=4y+4 ,     -10y-40=4 , -10y=44 y=-4,4
8.8y+(2y+4)^2=(4y-8)(y+5)
8y+(4y^2+8y+8y+16)=4y^2-8y+20y-40
8y+4y^2+16y+16=4y^2+12y-40
24y+16=12y-40
12y=-56
y=-4 2/3
10.4(y-3)^2=(2y-3)(2y-10)
4(y^2-6y+9)=4y^2-20y-6y+30
4y^2-24y+36=4y^2-26y+30
2y+36=30
2y=-6
y=-3