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dem82 [27]
2 years ago
12

Janelle was trying to find the distance between (3,7) and (9,6) in the coordinate plane. She knew the formula was D=√(9 - 3)^2 +

(6 - 7)^2. So she took the square root and got (9-3)+(6-7)=5. Did she get the correct answer? Explain.
Mathematics
1 answer:
s2008m [1.1K]2 years ago
5 0
Hello : 
incorrect  answer because : 
\sqrt{ a^{2} + b^{2} }  \neq   \sqrt{ a^{2} } + \sqrt{ b^{2}}  \neq a+b
but : 
\sqrt{ (a+b)^{2} } = a+b........a+b <span>≥ 0</span>
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