If P = − 12x2 – 10xy + 5y2, Q = 7x2 + 6xy + 2y2, and R = 5x2 + 2xy + 4y2 ; Find Q + P

If P = − 12x² – 10xy + 5y², Q = 7x² + 6xy + 2y², and R = 5x² + 2xy + 4y²; find Q + P

Sum

P = − 12x² – 10xy + 5y²Q = 7x² + 6xy + 2y²
R = 5x² + 2xy + 4y²

Q + P = (7x² + 6xy + 2y²) + (– 12x² – 10xy + 5y²)

= 7x²+ 6xy + 2y² – 12x² – 10xy + 5y²

= 7x – 12x² + 6xy – 10xy + 2y² + 5y²

= – 5x² – 4xy + 7y²

shaalaa.com

Is there an error in this question or solution?

Fill in the blank, when:
x = 3, y = 6, z = 18, a = 2, b = 8, c = 32 and d = 0.

c ÷ b = ...........

If a = 3, b = 0, c = 2 and d = 1, find the value of 6a − 3b − 4c − 2d

If a = 3, b = 0, c = 2 and d = 1, find the value of 2a² − 3b² + 4c² − 5d²

State true and false:

`(2"x"-4)/("x"+1)` = − 1, when x = 1

If a = 3, find the values of a² and 2^a.

Evaluate:

(9a – 3a) + 4a

Simplify:

a − (a − b − c)

Simplify:

− m − n − (− m) − m

Simplify:

`"a"-(2"a"-overline(4"a"+3"a"))`

Multiply and then evaluate:

(x – 2y + z) and (x – 3z); when x = − 2, y = − 1 and z = 1.