Question

solve the following equation by factorisation method. 1) 40+3x-x^2=0​

Answer 1

Answer:

The given expression −x

2

+3x+40 can be factorised as follows:

−x

2

+3x+40=−x

2

+8x−5x+40=−x(x−8)−5(x−8)=(−x−5)(x−8)=(x+5)(8−x)

Hence, −x

2

+3x+40=(x+5)(8−x)