8.
BY) +
Show that:
(b) (3xy – 7yz)2 + 84.xy2z = (3xy +
(a - b) (a + b) + (b - c)(b + c) + (C - a) (c + a) = 0
(2x - 7y)2 + 28xy
(C) (
(4x + 5y)2 – (4x - 5y)2 = 80xy
4x2 + 49y2
7yz)
(e)
Answers
Answered by
0
Step-by-step explanation:
Show that : (a) (2x - 7y)2 + 28xy = 4x2 + 49y2 (b) (3xy - 7yz)2 + 84xy2z = (3xy + 7yz)2 (c) (4x + 5y)2 – (4x - 5y)2 = 80xy. 1.
Class_7_rd_sharma for Class 7 Math Chapter 7 - Algebraic Expressions
(ii) (a4- 2a3b + 3ab3 + 4a2b2 + 3b4) + (-2a4- 5ab3 + 7a3b - 6a2b2 + b4) ... (ii) 4ab-5bc+7ca-3ab+2bc-3ca5 ab-3bc+4ca ... If P = 7x2 + 5xy − 9y2, Q = 4y2 − 3x2 − 6xy and R = −4x2 + xy + 5y2, show that P + Q + R = 0.
Answered by
0
Answer:
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Step-by-step explanation:
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