If - 2 x x- y 3 y - 3- 2 - 16- 9 - then y -

[ 2x amp;x; y amp;3y ][ 3; 2 ]=[ 16; 9 ] [ 6x+2x; 3y+6y ]=[ 16; 9 ] [ 8x; 9y ]=[ 16; 9 ] Comparing the two matrices, we get 8x = 16 →x = 2 9y = 9 → ...

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Byju's Answer

Standard X

Mathematics

Equality of Matrices

If [[ 2 x x;...

Question

If $[\begin{matrix} 2 x & x y & 3 y \end{matrix}] [\begin{matrix} 32 \end{matrix}] = [\begin{matrix} 169 \end{matrix}]$ , then y =
___.

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Solution

$[\begin{matrix} 2 x & x y & 3 y \end{matrix}] [\begin{matrix} 32 \end{matrix}] = [\begin{matrix} 169 \end{matrix}]$

$[\begin{matrix} 6 x + 2 x 3 y + 6 y \end{matrix}] = [\begin{matrix} 169 \end{matrix}]$

$[\begin{matrix} 8 x 9 y \end{matrix}] = [\begin{matrix} 169 \end{matrix}]$

Comparing the two matrices, we get

8x = 16

$\to$ x = 2

9y = 9

$\to$ y = 1

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Similar questions

Find y, if $[\begin{matrix} 2 x & x y & 3 y \end{matrix}] [\begin{matrix} 32 \end{matrix}] = [\begin{matrix} 169 \end{matrix}]$
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If [2xxy3y][32]=[169], then y = ___.

[2xxy3y][32]=[169] [6x+2x3y+6y]=[169] [8x9y]=[169] Comparing the two matrices, we get 8x = 16 →x = 2 9y = 9 →y = 1

If $[\begin{matrix} 2 x & x y & 3 y \end{matrix}] [\begin{matrix} 32 \end{matrix}] = [\begin{matrix} 169 \end{matrix}]$ , then y =
___.