Question

factorise :2x² - 7 - 15

Answer 1

Answer:

the question is wrong

there must be a pattern

so the correct question is

2x²-7x-15

Step-by-step explanation:

2x²-10x+3x-15

2x(x-5)+3(x-5)

answer is (x-5)(2x+3)

Answer 2

Answer:

I think your question is wrong.

The question may be this 2x²-7x-15

Step-by-step explanation:

2x²-7x-15

= 2x²-10x+3x-15

= 2x(x-5)+3(x-5)

= (x-5)(2x+3)

So x = 5 and

x = -3/2