Simplify the product using FOIL.
(5x+4)(3x+6)
a. 15x^2 - 18x - 24
b. 15x^2 - 42x + 24
c. 15x^2 + 42x + 24
d. 15x^2 + 18x - 24
(5x + 4)(3x + 4)
a. 15x^2 + 32x +16
b. 15x^2 - 8x - 16
c. 15x^2 - 32x + 16
d. 15x^2 + 8x - 16
(2x + 6)(5x - 7)
a. 10x^2 - 16 - 42
b. 10x^2 + 44x + 42
c. 10x^2 + 16x - 42
d. 10x^2 - 44x + 42
(5x + 4)(2x - 2)
a. 10x^2 + 2x - 8
b. 10x^2 - 18x + 8
c. 10x^2 - 2x - 8
d. 10x^2 + 18x + 8
(5x - 3)(5x - 5)
a. 15x^2 + 10x - 15
b.15x^2 - 10x - 15
c. 25x^2 +40 + 15
d. 25x^2 - 40x + 15
2007-12-03 03:27:41 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
It is already in simplified form , unless you mean expanding the terms . The answers are
1) c
2) a
3) c
4) d
2007-12-03 03:35:04 · answer #1 · answered by A Little Sarcasm Helps 5 · 0⤊ 1⤋
So, FOIL means "first, outside, inside, last." So multiply 5x by 3x, which gives you 15x^2.
Then multiply the outside, 5x by 6. This gives you 30x. Then the inside: 4 times 3x, which is 12x. Collect the terms 30x and 12x, and altogether you have 42x.
Finally, multiply 4 by 6, to get 24.
The final answer is C: 15x^2+42x+24.
Once you understand this, and if you can do basic multiplication, the rest of the problems are simple.
2007-12-03 03:34:46 · answer #2 · answered by Anonymous · 0⤊ 2⤋
For increasing cubic binomials the final formulation is as follows: (a + b) ^ 3 = a^3 + 3*a^2*b^a million + 3*a^a million*b^2 + b^3 on your case, a is x and b is -y^5 So (x - y^5)^3 = x^3 + 3*x^2*(-y^5)^a million + 3*x^a million*(-y^5)^2 + (-y^5)^3 Simplified: =x^3 - 3x^2*y^5 + 3x*y^10 - y^15 :D
2016-11-13 09:06:42 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Why can't you simplify it using FOIL?
2007-12-03 03:32:31 · answer #4 · answered by rgentry23 4 · 0⤊ 2⤋
You're not asking us to do your homework, are you?
2007-12-03 03:30:42 · answer #5 · answered by Robert L 7 · 0⤊ 2⤋