Question

factorise 2x^2-2x-84​

Answer 1

Answer:

First divide whole equation by 2

X²-x-42=0

Now factories as

Guess two number if x have 2 as highest power

3 if x have 3as highest power and So on

Now guess two numbers baby

Whose sum is - 1 and multiplication is - 42

And they are - 7 & 6

So we get (x-7)(x+6)=0

X=7,-6

Answer 2

Step-by-step explanation:

factors are ( x-6)(X+7)