4 years ago

Find the missing terms in the equation so that it is true. (3x + ?)^2=9x^2 + ?? +49y^2

Mathematics

1 answer:

valkas [14]4 years ago

8 0

Answer:

see explanation

Step-by-step explanation:

Note that 9x² and 49y² are perfect squares.

9x² = (3x)² → 3x is the first term

49y² = (7y)² → 7y is the second term

Hence

(3x + 7y)² = 9x² + 42xy + 49y²

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$\bf ~~~~~~~~~~~~\textit{middle point of 2 points }\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
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\boxed{x=0}\\
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