exam Maths Puzzle Numerical Ability

Please help.
Factor the trinomial.
16x^2 + 40xy + 25y^2

Read Solution (Total 0)

exam Other Question

perform the matrix row operations and write the new matrix
|2 -4 1 | 4 |
|-5 0 1 | -3 | -3R1+R2
|-1 5 -2 | -1 | find the equation of the line through the points (-2,4) parallel to the line
2x+7y=9

i tried solving for "y" but was not really sure if i was doing it right
or what to do after
-a/b=-2/7