JAMB - Mathematics (1997 - No. 13)
What value of g will make the expression 4x2 - 18xy + g a perfect square?
9
\(\frac{9y^2}{4}\)
81y^2
\(\frac{18y^2}{4}\)
解释
4x2 - 18xy + g = g \(\to\) (\(\frac{18y}{4}\))2
= \(\frac{18y^2}{4}\)
= \(\frac{18y^2}{4}\)