Ok, so the quadratic coefient is 1, so great
take 1/2 of the linear coefient and square it
10/2=5, (5)^2=25
add that to both sides
x^2+10x+25=7+25
factor perfect square trionomial
(x+5)^2=32
squaer root both sides
x+5=+/-4√2
minus 5
x=-5+/-4√2
x=-5+4√2 and -5-4√2
You have to find the angle for it try it!!!!!!!!!!
The area including cutout is 15*8=120
the area of cutout is 5*5=25
120-25=95 cm²
(-5,0) to make this easier you could use a number line and move to the left 2 places.
