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X2 plus 2x equals 3 solution graphically and check algebraically?
Wiki User
∙ 13y ago
x2 + 2x = 3
x2 + 2x - 3 = 0
x2 + 2x - 3 = y Graph the equation in a calculator and find its zeros, which are x = -3 and x = 1.
Check:
x2 + 2x = 3
(-3)2 + 2(-3) =? 3
9 - 6 =? 3
3 = 3 True
(1)2 + 2(1) =? 3
1 + 2 =? 3
3 = 3 True
Wiki User
∙ 13y ago
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