If 9/a = 7/a2 then a =?
Correct answer A. 7 ? 9
Tip: press A, B, C or D to answer, and N for the next question.
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See all(ab x (a+b)))/(1/a+1/b) =? If a = 1 b = 2
Correct answer D. 8 ? 2
(a+b)2 + (b+c)2 =
Correct answer A. a2 + 2b2 + 2ab + c2 + 2bc
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(8/Z)+(6/Z) x (40/Z) =? If Z=2
Correct answer E. 64
4×2 + 16x + 36 is equivalent to?
Correct answer D. 4 (x2+4x+9)
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