If x + 1 = 7, what is the value of x² + 2x + 1 ? A.) 36 B.) 37 C.) 48 D.) 49 E.) 81 x + 1 = 7 {given equation}
x = 6 {subtracted 1 from each side} x² + 2x + 1 {given expression} = (6)² + 2(6) + 1 {substituted 6, in for x, into given expression} = 36 + 12 + 1 {evaluated exponent and multiplied} = 49 {added} D.)  Algebra House
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