Question

What is the product

Answer 1

Answer:

$\left[\begin{array}{cc}6&18\\\end{array}\right]$

Step-by-step explanation:

To find the product of the matrices: $\left[\begin{array}{cc}4&2\\\end{array}\right]$ × $\left[\begin{array}{cc}-2&5\\7&-1\\\end{array}\right]$

Multiply rows of the first matrix by the columns of the second matrix.

(4 × (–2) + 2 × 7          4 × 5 + 2 × (–1))

After simplifying this, we get the product $\left[\begin{array}{cc}6&18\\\end{array}\right]$

Hence, $\left[\begin{array}{cc}4&2\\\end{array}\right]$ × $\left[\begin{array}{cc}-2&5\\7&-1\\\end{array}\right]$ = $\left[\begin{array}{cc}6&18\\\end{array}\right]$