alleryWhich of the following gives a LINEAR equation when set equal to zero?
Ax² − 4
B3x + 7
Cx³ − 1
Dx² + 5x
Answer & Solution
Correct answer: B. 3x + 7
A linear equation in one variable has the form ax + b = 0 (degree 1).
Of the four, only 3x + 7 is a degree-1 polynomial — setting it to zero gives 3x + 7 = 0, which is a linear equation.
The others have higher-degree terms and produce quadratic or cubic equations when set to zero.
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