Transpose of a matrix is obtained by interchanging the rows and columns.
A′=⎡⎢⎣2038−1−1−4−25⎤⎥⎦
A+A′=⎡⎢⎣2+28+0−4+30+8−1−1−2−13−4−1−25+5⎤⎥⎦=⎡⎢⎣48−18−2−3−1−310⎤⎥⎦
If (3x−4)(5x+7)=15x2−ax−28, then find the value of a.