Question

r – 4 = 0 (4, -4, 8, 0)

Answer 1

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Actually Welcome to the Concept of the Linear equation.

Since, here to find the value of r, we have to just solve the equality.

==> r - 4 = 0

==> r = 4

hence, here 4 is the zero of the equation, or we can say it's the root of the equation.