2x2 - 72 would be factored into (2x - 12)(x + 6) or (2x + 12)(x - 6)
To double check, multiply each pair:
(2x - 12)(x + 6) = 2x2 + 12x - 12x - 72 = 2x2 - 72
(2x + 12)(x - 6) = 2x2 - 12x + 12 x - 72 = 2x2 - 72
2x2 + 6x - 8 = 72 ∴ 2x2 + 6x + 64 =0 ∴ x2 + 3x + 32 = 0 This can not be factored, as x is not equal to any integer. Using the quadratic equation, we find that: x = -3/2 ± √119 / 2i
2*36=72
No. 9 is a factor of 72.
The highest common factor of the numbers 36, 60 and 72 is 12.
To square a number, multiply it by itself, so 7 squared, also written as 72, is 7 x 7, or 49.
x sq equalls 36 and x equalls plus or minus 6
2(x + 6)(x - 6) 2x^2 - 72 = 0 2x^2 = 72 x^2 = 36 x = 6, -6
-9(x + 8)
2(5r + 6)(5r - 6)
22 x 52 x 72 = 702
(7x + 8)(7x - 9)
2x2 + 6x - 8 = 72 ∴ 2x2 + 6x + 64 =0 ∴ x2 + 3x + 32 = 0 This can not be factored, as x is not equal to any integer. Using the quadratic equation, we find that: x = -3/2 ± √119 / 2i
2*36=72
722 = 72 x 72 = 5184
a2 - a - 72 = (a - 9)(a + 8)
5x-72
72 is not a factor of 18; 18 is a factor of 72.