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Answer:
b = ± [tex]\sqrt{c^2-a^2}[/tex]
Step-by-step explanation:
given
a² + b² = c² ( subtract a² from both sides )
b² = c² - a² ( take square root of both sides )
[tex]\sqrt{b^2}[/tex] = ± [tex]\sqrt{c^2-a^2}[/tex]
b = ± [tex]\sqrt{c^2-a^2}[/tex]