Question

hint...x²-49=(x+7)(x-7)
factorise the numerator ...​

Answer 1

Answer:

x²-3x-28 =3

x²-49 17

x²-(7-4)x-28 =3

x²-49 17

x²-7x+4x-28 =3

x²-49 17

x(x-7)+4(x-7) = 3

(x)²-(7)² 17

(x-7) (x+4) = 3

(x+7) (x-7) 17

(x+4) = 3

(x+7) 17

17(x+4) = 3(x+7)

17x+68 = 3x+21

17x-3x = -68+21

14x = -47

x = -47

14