Question

Solve 9x2-9(a+b)x+(2a2+5ab+2b2)=0 by factorisation​

Answer 1

Step-by-step explanation:

9x

2

−9(a+b)x+(2a

2

+5ab+2b

2

)=0

⟹9x

2

−9(a+b)x+[2a(a+2b)+b(a+2b)]=0

⟹9x

2

−9(a+b)x+[(2a+b)(a+2b)]=0

⟹9x

2

−3[(a+2b)(2a+b)]x+[(2a+b)(a+2b)]=0

⟹3x[3x−(a+2b)][3x−(2a+b)]=0

⟹3x=a+2b

⟹x=

3

a+2b

or,

⟹3x=2a+b

⟹x=

3

Answer 2

Answer:

refer to the pictures for the answers