Question

factorise 2x^2-7x-15

Please help me mates

Answer 1

Answer:

Step-by-step explanation:

2x^2 - 7x - 15

2x^2 - 10x + 3x - 15

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

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

Answer 2

Answer: here the perfect square can't be find so we use a formula:

                                                    d=b^2-4ac

a=2,b=7,c=15;

                                           A.T.Q

d=49-4(2)(15)

d=49-120

d= -71

now the factors :

α= -b-√d/2a=   -7-√-71/4

β=-b+√d/2a=    -7√-71/4

its complex to solve its factor alpha and beeta.