2007-12-21 16:28:20 · 9 answers · asked by Labreshai P 1 in Science & Mathematics ➔ Mathematics
3 x ² + 12 x + 5 x + 20
3 x ² + 17 x + 20
2007-12-24 01:49:29 · answer #1 · answered by Como 7 · 1⤊ 1⤋
Apply Foil:
(3x+5)(x+4) = 3x*x+3*4x+5*x+5*4 = 3x^2+12x+5x+20 = 3x^2+17x+20
2007-12-22 00:33:03 · answer #2 · answered by vokuheila 2 · 0⤊ 2⤋
the answer is 3x^2 + 5x + 12x + 20
simplify so the final answer is 3x^2 + 17x + 20 = 0
2007-12-22 02:03:52 · answer #3 · answered by Vida Joy 3 · 0⤊ 2⤋
3x(x) + 3x(4) + 5(x) + 5(4) =
3x² + 12x + 5x + 20
= 3x² + 17x + 20
~~~
2007-12-22 00:32:30 · answer #4 · answered by A Little Sarcasm Helps 5 · 1⤊ 2⤋
(3X+5)(x+4)
= (3X x X) + (5 x X) + (3X x 4) + (5 x 4)
= 3X^2 + 5X + 12X + 20
= 3X^2 + 17X + 20
X= unknown
x = multiply
2007-12-22 04:46:53 · answer #5 · answered by An ESL Learner 7 · 0⤊ 3⤋
3x^2 +5x +12x +20
= 3x^2 +17x +20
2007-12-22 00:32:03 · answer #6 · answered by BOND 3 · 0⤊ 2⤋
(3x+5)(x+4)
3x * x + 5x + 12x + 20
3x^2 + 17x + 20
2007-12-22 07:43:38 · answer #7 · answered by ces 3 · 0⤊ 3⤋
Have you heard of F.O.I.L. ?
It refers to First Outside Inside and Last .
Multiply the first terms in both brackets:
3x times x = 3x^2
then multiply the 'outside' terms:
3x times 4 = 12x
now multiply the 'inside' terms:
5 times x = 5x
and lastly, multiply the Last terms in each bracket:
5 times 4 = 20
Collecting like terms yields the following trinomial expression:
3x^2 + 17x + 20
2007-12-22 00:38:58 · answer #8 · answered by screaming monk 6 · 0⤊ 3⤋
(3x+5)(x+4)
Use the foil method.
Firft
Outer
Inner
Last
multiply each term by the other terms.
3x*x=3x^2
3x*4=12x
5*x=5x
5*4=20
The answer is:
3x^2+12x+5x+20
simplifies to:
3x^2+17x+20
2007-12-22 02:02:39 · answer #9 · answered by Melissa 6 · 0⤊ 2⤋