Question

x²+3x+70=0
How to solve this quadratic equation by factorisation method​

Answer 1

You can't. The two factors of 70 which are 7, 10 give the minimum sum 17. It is impossible to get 3 from both numbers.

You are only able to solve this over complex, because two roots are both complex.

Answer 2

Answer:

See the attached image.

Hope it helps you