Mathematics for IGCSE & O level - Graphs Of Functions (Section 5 - No. 36)
What will be the value of y when y= x^2 + 2x - 3, and x is equal to -2?
-7
-3
5
-5
Explanation
Substitute x = -2 into the equation: y = (-2)^2 + 2*(-2) - 3 = 4 - 4 - 3 = -3
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