0
2 x 2 + x - 1 = 0
4 + x - 1 = 0
4-1 + x = 0
3 + x = 0
3 + x - 3 = 0 - 3
x = -3
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Another Solution Method (including text) for:
2 * 2 + x - 1 = 0
1. Do simple operations (*/+-) within from left to right:
2 * 2 + x - 1 = 0
4 + x - 1 = 0
3 + x = 0
2. Group like terms:
- move numerical terms from the left side of the equal sign to the right side of the equal sign (remember to change the sign when moving from the left to the right of the equal sign):
3 + x = 0
x = 0 - 3
3. Do simple operations (^*/+-):
x = 0 - 3
x = - 3
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