X^2-10x=-21
It is a quadratic equation with variable x.
x2 - 10x = -21
adding 21 on both sides
x2 - 10x + 21 = -21 + 21
x2 - 10x + 21 = 0
x2 - 7x - 3x + 21 0
x(x - 7) - 3(x - 7) = 0
(x - 3)(x - 7) = 0
x-3 = 0; x - 7 =0
x = 3, 7
So, the values of x are 3 and .
It is a quadratic equation with variable x.
x2 - 10x = -21
adding 21 on both sides
x2 - 10x + 21 = -21 + 21
x2 - 10x + 21 = 0
x2 - 7x - 3x + 21 0
x(x - 7) - 3(x - 7) = 0
(x - 3)(x - 7) = 0
x-3 = 0; x - 7 =0
x = 3, 7
So, the values of x are 3 and .
