how do you factor
2007-10-31 00:57:27 · 5 answers · asked by lilcarrollw 2 in Science & Mathematics ➔ Mathematics
(3z - 5)(z + 2)
2007-10-31 02:32:58 · answer #1 · answered by Como 7 · 0⤊ 0⤋
3z² + z - 10 = 0
The middle term is + z
Find the sum of the middle term
multiply the first term 3 times the last term 10 equals 30 and factor
Factors of 30
1 x 30
2 x 15
3 x 10
5 x 6. . .←. .use these factors
+ 6 and - 5 satisfy the sum of the middle term
insert + 6z and - 5z into the equation
3z² + z - 10 = 0
3z² + 6z - 5z - 10 = 0
Grouip factor
(3z² + 6z) - (5x - 10) = 0
3z(z + 2) - 5(z + 2) = 0
(3z - 5)(z + 2) = 0
- - - - - - - -s-
2007-10-31 01:19:25 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
10: x3 + 2x + 3x2 + 6 (x + 3) (x2 + 2) eleven: x3 - 4x2 + 2x - 8 (x2 + 2) (x - 4) 12: 3x3 + 4x2 - 6x - 8 (x2 - 2) ( 3x + 4) thirteen: 4x2 + 8x + 6x + 12 2(x + 3) (x + 2) 2(2x + 3) (x + 2) 2(x2 + 3) (x + 2) are you advantageous you variety the situation good? 14: 3x3 + 6x2 + 9x + 18 3(x2 + 3) (x + 2) 15: element the version of two squares: x2 - 9 (x + 3)(x -3) sixteen: y2 - sixteen (y + 4)(y - 4) 17: w2 - 4 (w + 2)( w - 2) 18: element employing any technique: seventy 5 - 3z2 3(5 + z)(5 - z) 19: a2b + 3a2 - 4b - 12 (a - 2)(a + 2)(b + 3) 20: a2 + 4 this could't be factored
2016-11-09 21:32:25 · answer #3 · answered by monsalvatge 4 · 0⤊ 0⤋
factors into (3z-5)(z+2)
2007-10-31 01:03:29 · answer #4 · answered by Scott 3 · 0⤊ 0⤋
4z^2-10
I think that might be right.
2007-10-31 01:00:36 · answer #5 · answered by dynamicelf123 1 · 0⤊ 0⤋