Question

Question (1)
x2-y2

Question (2)
(x+y+z)square​

Answer 1

Answer:

1. (x + y)(x - y)

2. x² + y² + z² + 2xy + 2yz + 2xz

Step-by-step explanation:

1. x² - y² = (x + y)(x - y)
2. (x + y + z)² = x² + y² + z² + 2xy + 2yz + 2xz

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Answer 2

Answer:

1. x2 + y2 = r2 , and this is the equation of a circle of radius r whose centre is the origin O(0, 0). The equation of a circle of radius r and centre the origin is x2 + y2 = r2 .

2. (x-y-z)². = [x+(-y)+(-z)]². = x²+(- y)²+(-z)²+2x(-y)+2(-y)(-z)+2(-z)x. /* By algebraic identity: (a+b+c)²=a²+b²+c²+2ab+2bc+2ca.

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