Mecoy1viz
Mecoy1viz
Math
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4x2-32x=-28quadratic equation completing square
Sagot :
Jeonelvieviz
Jeonelvieviz
4x²-32x=-28
4x²-32x+28=0 devided by 4
x²-8x+7=0
x²-8x=-7
x²-8x+[1/2(-8)]=-7+[1/2(-8)]
x²-8x+16=-7+16
x²-8x+16=9
(x-4)²=9
x-4=√9
x-4= positive and negative 3
x-4=3 x=3+4 x=7
x-4=-3 x=-3+4 x=1
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