Substituting x = – 3 in x^2 + 5x + 4 gives (– 3)^2 +5(– 3)+4 = 9+2+4 = 15
Substituting x = – 3 in
x^2 + 5x + 4 gives (– 3)^2 +5(– 3)+4 = 9+2+4 = 15
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