Check whether the following are perfect squares or not : (a) `64x^(2) + 81y^(2) - 144 xy` (b) `4x^(2) + 8y^(2) + 16 xy`

Check whether the following are perfect squares or not : (a) `64x^(2)

1.	Check whether the following are perfect squares or not : (a) `64x^(2) + 81y^(2) - 144 xy` (b) `4x^(2) + 8y^(2) + 16 xy`
Answer» Correct Answer - (a) Perfect square (b) Not perfect square

Which of the following is/are perfect squares ?A. `16a^(2) + 36b^(2) - 48 ab`B. `9x^(2) + 18xy + 9y^(2)`C. Both (a) and (b)D. Neither (a) nor (b)
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If `3x + (1)/(x) = 6` , then find `9x^(2) + (1)/(x^(2))`.A. 24B. 27C. 30D. 33
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