Question

3. x² +8x-2=0 solve it with completing square method​

Answer 1

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x^2+8x-2=0

Last term=middle term^2/first term*4

LT=64/4

=16

x^2+8x+16-16-2

(x+4)^2--18

(x+4)^2--(root18)^2

=(x+4-root18)(x+4+root18)

X+4-root18=0. x+4+root18=0

x=root18-4. x=-root18-4