Mathematics for IGCSE & O level - Algebraic Manipulation (Section 7 - No. 31)
Which of the following is a linear equation?
x^2 + 2x = 0
2x + 3 = 7
x^3 - 8 = 0
x^2 + y^2 = 4
Explanation
A linear equation is one where the highest power of the variable is 1
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