(2y + 3)(4y2 - 6y +9)
27 cu. ft in 1 yard, 4 into 12 3 times, 27x3=81. 81 sq. ft .
27 x 3 equals 81. Do it simply - 20 x 3 is 60, - 7 x 3 is 21. - 60 +21 is 81
27X^3 - 64 = 0 add 64 to each side 27X^3 = 64 divide each side by 27 X^3 = 64/27 take cubic root of each side X = cubic root(64/27) easy cubic root X = 4/3 check 27(4/3)^3 - 64 = 0 27(2.37037037) - 64 = 0 64 - 64 = 0 checks
a proper factor is a factor.
19
208
(2y + 3)(4y^2 - 6y + 9)
(2y + 3)(4y2 - 6y +9)
2y(2y - 1)(2y - 3)
2y(2y - 1)(2y - 3)
61 + 27x3
The only common factor of those two terms is the number three, giving you: 3(x3 - 8y3)
There's a formula for the sum of cubes. (3x + 4)(9x^2 - 12x + 16)
81
(2y)3 = 8y3
(3x)3 = 27x3