Question

x2 +x -72 by middle splitting terms

Answer 1

Answer:

x²+x-72

x²+9x-8x-72

x(x+9)-8(x+9)

(x-8)(x+9)

Answer 2

Answer:

x^2+9x-8x-72=0

x(x+9)-8(x+9)=0

(x-8)(x+9)=0

THEREFORE x=8,-9. (9×8=72 and 9-8 =1)