Answer:
Step-by-step explanation:
(-5)^2 - (-5^2)
25 - (-25)= 25 + 25 = 50
It's basically 2 similar triangles. Depending on where you put the pin, you are setting the ratio of similitude.
The square of a positive integer added to 4 times the integer is 437..
x2 + 4x = 437
I chose to do this by completing the square..
x2+4x+4 = 437 + 4
(x+2)2 = 441
Take square root of both sides
x+2 = ±√441
x = -2 ± 21
x = -23 or x = 19
x = 19
3x+20=7x , then u do 7x minus 3x equals 4x then will have 4x=20 then u divide 20 by 4 and u will get 5 so x=5
