Geometry/algebra math help?

Question

can someone help me solve these (with work)?

x² - x - 72

and

a² - 10a + 24

and

(fyi that's a 3 behind the 10 and a 2 behind the n)

10³n² - 15m²n

and

x² + 12x + 36

and

x² - 64

Answer 1

1. x^2- x -72

step one.

minus a x so you have x-72

  then add 72 to both times so then x=72

#2

simpified it ='s

-8a + 24

then

- 24 from both sides and  then

is simplifes to

-8a=-24

then divide both sides by -8 so A=3

#3

10^3 x n^2 - 15 m^2 x n

1000 x n^2 -15m^2x n

1000x 2N^2= 15m^2

so ='s

66 2/3rd times N = M (i think that one really confused me)

#4

x^2 +12x +36

same as

x^2 + 12x = -36

square root both sides to cancel the ^2

so

13x = 6

divide by 13

so x = .46 same as x= 23/50ths

#5

x^2 - 64

same as

x^2 = 64

square root both sides and the answer is

x= 8