Question

solve the following quadratic equation by factorisation x square - 15 X + 54 is equal to zero

Answer 1

x²-15x+54
x²-9x-6x+54
x(x-9)-6(x-9)
(x-9) (x-6)

Answer 2

Here
a=1 , b=-15 , c=54

Therefore. D=b^2-4ac
=(-15×-15)-4(1)(54)
=225-54
=171