(х+3)^2-х^2=33 , х^2-(х-5)^2=10 , (х+12)^2=х*(х+8) , (х-3)*(х+1)=(х-2)^2

Question

(х+3)^2-х^2=33 , х^2-(х-5)^2=10 , (х+12)^2=х*(х+8) , (х-3)*(х+1)=(х-2)^2

Answer 1

1) x^2 +6x + 9 -x^2 =33
    6x = 24
     x = 4
2) x^2 - x^2 + 10x - 25 = 10
    10x = 35
     x=3.5
3) x^2 + 24x +144 = x^2 + 8x
    144 = 8x - 24x +x^2 - x^2
    144 = -16x
     x = -9
4) x^2 - 3x + x -3 = x^2 -4x + 4
    2x = 7
    x=3.5