Simplify the following:
3x2 + 4x + 3x2 - 4y
(5x - 2y) - (4x + 8y)
3x3(2x2)
(-6a3b4)2
(x + 9)(x - 9)
(3x - 7)2
(3x + 6)(4x - 7)
2007-12-26 06:10:35 · 3 answers · asked by Ashley A 1 in Science & Mathematics ➔ Mathematics
3x2 + 4x + 3x2 - 4y = 6x² + 4x - 4y
(5x - 2y) - (4x + 8y) = 5x - 2y - 4x - 8y = x - 10y
3x3(2x2) → (3x³) (2x²) = 6x*5; note: High *5 = to the 5
(-6a3b4)2 → (-6a³b*4)² = 36a*6b*8 ; he|she|it senses|feels a*6 = in high to the 6; b*8= high b to the 8
(x + 9)(x - 9) he|she|it frequents of the product of the sum of two numbers from its|his|her|their difference and this it is square =al of the first, less the square of the second.
(x+9)(x-9)= (x² - 9²) = x² - 81
(3x - 7)2 → (3x - 7)² frequents of the square of the difference of two numbers and is = to|in the square of the first, less the double of the first for the second, more the square of the second.
(3x - 7 )² = 9x² - 42x + 49
(3x + 6)(4x - 7) = 12x² - 21x + 24x - 42 = (12x² + 3x - 42); (dividint-t 'him everything among 3) = 4x² + x - 14
Expecting that he|she|it has understood itself|himself|herself, he|she|it receives a greeting since Catalonia and Good Christmas
2007-12-26 08:40:08 · answer #1 · answered by josep d 7 · 0⤊ 0⤋
= (6x^2) + 4x - 4y
= 2( [3x^2] + 2x - 2y )
= 5x - 2y - 4x - 8y
= x - 10y
= 6(x^5)
= -12(a^3)(b^4)
= (x^2) - 81
= 6x - 14
= 12(x^2) -21x + 24x - 42
= 12(x^2) + 3x - 42
2007-12-26 06:24:54 · answer #2 · answered by lucis 2 · 0⤊ 0⤋
6x^2 + 4x - 4y....add like terms
x - 10y.................add like terms
6x^5.....................x^m * x^n = x^(m+n)
36a^5b^8.............(x^m)^n = x^mn
x^2 - 81.................(a+b)(a-b)=a^2 - b^2
6x^2 - 42x + 49....(a-b)^2 = a^2 - 2ab + b^2
12x^2 +3x - 42.....FOIL
2007-12-26 06:24:03 · answer #3 · answered by norman 7 · 0⤊ 0⤋