Question

x(x-8)=4 -x²+6x+7=0 x²+12x=9968 t2=6√2t +2

Answer 1

x²-8x=4

x²-8x+16=20

(x-4)²=20

x-4=±2√5

x=4-2√5,x=4+2√5

x²-6x-7=0

(x-7)(x+1)=0

x=7,x=-1

x²+12x+36=10004

(x+6)²=10004

x+6=±2√2501

x=-6-2√2501,x=-6+2√2501

t²-6√2t+18=20

(t-3√2)²=20

t-3√2=±2√5

t=3√2-2√5,t=3√2+2√5