Question

sq.3 solving quadratics using square roots
score: 8/25 answered: 10/25
question 21
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solve the formula for the indicated variable.
pythagorean theorem.
$a^{2}+b^{2}=c^{2}$; solve for $a$

Explanation:

Step1: Isolate $a^2$ term

Subtract $b^2$ from both sides.
$a^2 = c^2 - b^2$

Step2: Take square roots of both sides

Apply square root to solve for $a$.
$a = \pm\sqrt{c^2 - b^2}$

Answer:

$a = \pm\sqrt{c^2 - b^2}$