Question

Evaluate 9a²-b²;if a=1,b=3​

Answer 1

Answer:

Given

value of a = 1

value of b = 3

Equation = 9a² -b²

9(1)² - (3)²

9. - 9

0

Hope it helps

Answer 2

Answer:

0

Step-by-step explanation:

$9a {}^{2} - b {}^{2} \\ a = 1. \: \: b = 3 \\ put \: in \: the \: equation.. \\ = 9(1) {}^{2} - (3) {}^{2} \\ = 9 - 9 \\ = 0$

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