Answer:
64
Step-by-step explanation:
(2x + 3y)^2 = 4
xy = -5
4x^2 + 9y^2
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(2x + 3y)^2 = 4 [Start here]
4x^2 +12xy + 9y^2 = 4 [Expand]
4x^2 +12(-5) + 9y^2 = 4 [Substitute xy = -5]
4x^2 -60 + 9y^2 = 4
4x^2 + 9y^2 = 4 + 60 [Rearrange]
4x^2 + 9y^2 = 64 [64 is the value of 4x^2 + 9y^2]
