Question

For x = 5 and y = 2, verify the following
(i) (x + y)2 = x2 + 2xy + y2
(ii) x2 - y2 = (x + y) (x - y)
(iii) (x + y) = x + y + 3xy + 3xy2
(iv) (x - y = x2 - 2xy + 2
(v) (x + y)2 = (1 - y)2 + 4xy​

Answer 1

Step-by-step explanation:

$1){(5 + 2) ^{2} } = 25 + 20 \: +4 = 49 \\2) ( {5}^{2} - {2}^{2} ) = 7 \times 3 = 21$

Answer 2

Answer:

x=5 and y=2

1) ( x+y)² = x² +2my + y²

(5 + 2)² = 5² + 2×5×2 + 2²

7² = 25 + 20 + 4

49 = 49

prove

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