Solve 52 - x 2 + x = 10
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52 -x^2 +x =10
=> 0= x^2 -x +10-52
0= x ^2 -x -42
0= x^2-7x +6x -42
0=x(x-7)+6(x-7)
0=(x-7)(x+6)
0=x-7 ; 0= x+6
x=7 ;x=-6
=> 0= x^2 -x +10-52
0= x ^2 -x -42
0= x^2-7x +6x -42
0=x(x-7)+6(x-7)
0=(x-7)(x+6)
0=x-7 ; 0= x+6
x=7 ;x=-6
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