If a + b = 5 and a - b = 3 then the value of a² + b² should be
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A^2 + B^2 = A^2 + B^2 + 2 AB
(A + B) + (A - B) = 5 + 3
2A = 8
A = 4
Checking: 4 + 1 = 5 and 4 - 1 = 3
Now by identity:
(4)^2 + (1)^2 + 2(4)(1)
16 + 1 + 8
16 + 9
25 = answer
Hope it helps you
(A + B) + (A - B) = 5 + 3
2A = 8
A = 4
Checking: 4 + 1 = 5 and 4 - 1 = 3
Now by identity:
(4)^2 + (1)^2 + 2(4)(1)
16 + 1 + 8
16 + 9
25 = answer
Hope it helps you
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