express the square of a binomial and evaluate it-
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i) 4x² + 12xy + 9y²
substituting or putting x = -2, y = 2
= 4 × (-2)² + 12×(-2)×2 + 9×(2)²
= 4×4 + 12×(-4) + 9×4
= 16 - 48 + 36
= 16 - 12
= 4
substituting or putting x = -2, y = 2
= 4 × (-2)² + 12×(-2)×2 + 9×(2)²
= 4×4 + 12×(-4) + 9×4
= 16 - 48 + 36
= 16 - 12
= 4
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