2+x-4 = 12
x = 12+4-2
x = 14
x4 + 7x2 - 60 = x4 + 12x2 - 5x2 - 60 = x2(x2 + 12) - 5(x2 +12) = (x2 - 5)(x2 +12)
5 plus 25 equals 60. Need to solve for 5 plus 25 equals ?: 2 plus 10 equals 24 is equivalent to 2 × (1 plus 5) equals 2 × (12); and 3 plus 15 equals 36 is equivalent to 3 ×(1 plus 5) equals 3 × (12); thus 5 plus 25 equals ? is equivalent to 5 × (1 plus 5) equals 5 × (12); thus ? = 5 × 12 = 60.
It doesn't ! -7 plus -5 equals -12 ! -7 plus 5 equals -2
yes. think of 6/12 plus 1/12. that is 7/12!
(x + y)2 = x2 + 2xy + y2 So x2 + y2 = (x + y)2 - 2xy = a2 - 2b Then (x2 + y2)2 = x4 + 2x2y2 + y4 So x4 + y4 = (x2 + y2)2 - 2x2y2 = (a2 - 2b)2 - 2b2 = a4 - 4a2b + 4b2 - 2b2 = a4 - 4a2b + 2b2
I come up with 20.
10 plus 10 equals 20 20 divide by 10 equals 2 2 plus 10 equals 12
12.
2
The equation is y + 2 = 12.
It equals 70
y=x+2if y=66=x+26-2=x4=xso x=4