Test Series for Class 9 Math

Q 11. The condition that the equation ax + by + c = 0 represents a linear equation in two variables is:

(a.)

a ≠ 0, b = 0

(b.)

b ≠ 0, a = 0

(c.)

b = 0, a = 0

(d.)

b ≠ 0, a ≠ 0

Answer. d

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Test Series for Class 9 Math - Ques 11 Ans