algebra is rough, please help
2007-07-12 13:08:38 · 14 answers · asked by catlover f 1 in Science & Mathematics ➔ Mathematics
When the numbers and variables are next to each other, it means you multiply. Usually though, the numbers (coefficients) are written before the variables. So you'd usually see your statement written this way:
2b - 2bc + 2c
You can put it in parenthesis to keep it sorted, if you like:
(2b) - (2bc) + (2c)
Then, just plug in the values for b and c:
(2 * -4) - (2 * -4 * -2) + (2 * -2)
Multiply everything that needs multiplying; keep in mind that if the signs are the same, when you multiply the answer (product) is positive. If they're different, the product is negative...
(-8) - (16) + (-4)
Then just add/subtract:
-28
Hope that helps!
[EDIT: I just realized, if those are supposed to be exponents, then kn_srikanth is correct above. Based on the way they're arranged they probably are supposed to be exponents, but maybe you for got the carrot symbol?]
2007-07-12 13:22:39 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Question is attracting many different answers because some think that b2 = 2 x b and some think b2 = b² .
I am going for b² !!!:---
b² - 2bc + c²
(- 4)² - 2 (- 4) (- 2) + (- 2)²
16 - 16 + 4
4
2007-07-15 19:23:44 · answer #2 · answered by Como 7 · 0⤊ 0⤋
A quick way is to note that b^2 -2bc + c^2 = (b-c)^2 .
Plug in b=-4, c=-2 to get
(-4 +2)^2
= (-2)^2
= 4
2007-07-12 13:13:00 · answer #3 · answered by Optimizer 3 · 0⤊ 0⤋
exchange in the values,,, (3)^2 - 2(3)(-2) + (-2)^2 order of operations PEMDAS P for parenthesis.. each and every element interior parenthesis is simplified,.,, next exponents or... 3^2 and -2^2 9 -2(3)(-2) + 4 next the M = multiply... 9 +12 + 4 now do the addition = 25 the respond is c
2016-10-01 11:56:45 · answer #4 · answered by ? 4 · 0⤊ 0⤋
b2-2bc+c2
(-4)2-2(-4)(-2)+(-2)2
-8-2(8)-4
-8-16-4
-28 is the ans.
2007-07-12 13:45:05 · answer #5 · answered by Anonymous · 0⤊ 0⤋
(-4x2)-(2x-4x-2)+(-2x2)
= -8+16 cause minus times a minus = +. then -4
= -8+16-4
= 10
hope that helps
2007-07-12 13:14:50 · answer #6 · answered by No.1 Quarterback 2 · 0⤊ 0⤋
is that b2 b squared or 2b? let me know and i have the answer, you just have to subsitute the values and remember the addition and subtraction signs switch with negatives!..if its b squared and c squared, the answer is:
16
2007-07-12 13:15:09 · answer #7 · answered by MFDCW 2 · 0⤊ 0⤋
You better work hard and figure that one out, because you sure are going to need that information all throughout your life.
This is why kids get out of school as dumb as a box of rocks..
2007-07-12 13:12:07 · answer #8 · answered by Anonymous · 1⤊ 0⤋
this is so easy.... you just plug in B and C... wait till you actually have to SOLVE for B or C. You really need to learn this. It's so basic.
2007-07-12 13:31:08 · answer #9 · answered by jeannes85 3 · 0⤊ 0⤋
I cant believe you are asking other people to do your homework. Pretty lazy. You will need this later in life. Trust me.
2007-07-12 13:17:22 · answer #10 · answered by ? 3 · 0⤊ 0⤋