Skip to main contentSkip to solution

For what values of xx and yy, are the following matrices equal?

A=[2x+13y0y2−5y]A=\begin{bmatrix}2x+1 & 3y\\ 0 & y^2-5y\end{bmatrix}, B=[x+3y2+20−6]B=\begin{bmatrix}x+3 & y^2+2\\ 0 & -6\end{bmatrix}

Solution

✅ Correct Option: 1

Equal matrices need every corresponding entry equal.

2x+1=x+3⇒x=22x+1 = x+3 \Rightarrow x = 2.

3y=y2+2⇒y=13y = y^2+2 \Rightarrow y = 1 or 22.

y2−5y=−6⇒y=2y^2-5y = -6 \Rightarrow y = 2 or 33.

The common value is y=2y = 2, so x=2x=2, y=2y=2.

Keyboard Shortcuts

  • Left arrow: Previous question
  • Right arrow: Next question
  • S key: Jump to solution
  • Q key: Jump to question