Question

Factorise: m²-8m-40
Explain with steps

Answer 1

Answer:

-b+- √b^2- 4ac/2a

8+-√64+160/2

8+14/2& 8-14/2

Answer 2

Answer:

m =(8-√80)/2=4-2√ 5 = -0.472

m =(8+√80)/2=4+2√ 5 = 8.472