Aaron is 5 years younger than ron. four years later,ron will be twice as old as Aaron.Find their present ages
2X = 5 MOD 9
ax^4 -bx^3+2x^2-5x-4=0 find a
expand 53*47 by substitution from expansion of (3x-7)(2x+7)
ax^4 -bx^3+2x^2-5x-4 find a
3 $\sqrt{\}$ 264
ax^4 -bx^3+2x^2-5x-4
x-y-z=7
-x+2y-3x= -12
3x-2y+7z=-30
6x+y=8x-5
(a + b) multiply 7a^2 b^2
