So to solve, make an equation (x being the shorter side)
2x+2(7+x)=42
So just solve from here.
2x + 14 + 2x =42
4x=28
x=7
So the shorter side is 7, and the longer side is 14.
Answer:


Step-by-step explanation:
<u>Second-Degree Equation</u>
The second-degree equation or quadratic equation has the general form

where a is non-zero.
There are many methods to solve the equation, one of the most-used is by using the solver formula:

The equation of the question has the values: a=1, b=2, c=4, thus the values of x are


Since the square root has a negative argument, both solutions for x are imaginary or complex. Simplifying the radical

The solutions are


Answer: B
<u>Step-by-step explanation:</u>
-10x² + 12x - 9 = 0
a=-10, b=12, c=-9
x = 
= 
= 
= 
=
+/- 
=
+/- 
=
+/- 