Question

1. If a and B are the roots of x2 + 7 x + 10 = 0 find the values of
(i)
(a.- B)​

Answer 1

Answer:

Let α be the common root.

∴α

2

−7α+10=0 ...(1)

and ∴α

2

−10α+16=0 ...(2)

Subtracting (2) from (1)

∴(α

2

−7α+10)−(α

2

−10α+16)=0−0

∴3α−6=0

∴α=2

So, the answer is option (B)

Answer 2

x²+7x+10=0

x²+(5x+2x)+10

x²+5x+2x+10

x(x+5)+5(x+5)

(x+5)(x+5)

This is the answer of this question

I hope this will help you