If $\begin{bmatrix}a & c+d \\c-d & a+b… | ClassNotes

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If $\begin{bmatrix}a & c+d \\c-d & a+b… | ClassNotes

E

Editor

Sep 18, 2022

If $\begin{bmatrix}a & c+d \\c-d & a+b \end{bmatrix}=\begin{bmatrix}3 & 5 \\9 & 10 \end{bmatrix}$ then b=?

Difficulty: Easy

A:

2

B:

8

C:

13

D:

7

ID: 63273dbaca83163ac3a11a87