Question

Pls help me in question 2 not 1 can you send me answers with method pls

Answer 1

Step-by-step explanation:

Quadratic formula

and also use identity

Answer 2

Step-by-step explanation:

1. -(5x²+x-4)=-(5x²+5x-4x-4)=-[5x(x+1)-1(x+1)]=[(5x-1)(x+1)]

2. a²+4b²-4ab-9c²=(a-2b)²-(3c)²

=(a-2b+3c)(a-2b-3c)

3. y²+2y-48=y²+8y-6y-48=y(y+8)-6(y+8)=(y+8)(y-6)

4. 10pq-3rq-10ps+3rs=q(10p-3r)-s(10p-3r)=(10p-3r)(q-s)

5. x²+2x+1-y²=(x+1)²-y²=(x+1+y)(x+1-y)