Question

solve of the following
(x+y) (x+y) - use formula
to multiply - what is the answer
​

Answer 1

Answer:

Correct option is

D

(6, 1)

−x+y=7 ----- (1)

2x−3y=9 ----- (2)

First use formula for cross multiplication method:

b1c2−b2c1x=c1a2−a1c2y=a2b2−a2b1−1

So, from equation (1) and (2) we can write the value of a, b and c.

1×9−(−3)×7x=7×2−1×9y=1×(−3)−2×1−1

9+21x=14−9y=−3−2−1

30x=5y=

Answer 2

Answer:

x²+y²+2xy

Step-by-step explanation:

(x+y)(x+y)

x(x+y)+y(x+y)

x²+xy+xy+y²

x²+y²+2xy

OR

(x+y)(x+y)

(x+y)²

x²+y²+2xy [ (a+b)² = a²+b²+2ab ]

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