it's about math.
2007-11-17 21:28:45 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
(x+2)(x+21)=x^2+21x+2x+42
=x^2+23x+42.
2007-11-17 22:29:01 · answer #1 · answered by Syed A 1 · 0⤊ 1⤋
(x+2)(x+21)=
x*x + 21x + 2x + 2*21=
x² +23x +42
2007-11-18 00:23:15 · answer #2 · answered by cerelac 2 · 0⤊ 1⤋
=x^2+23x +42
2007-11-17 21:31:59 · answer #3 · answered by mbdwy 5 · 1⤊ 0⤋
FOIL it:
( x + 2 ) ( x + 21 )
. = x² + 2x + 21x + 42
. = x² + 23x + 42
2007-11-17 21:35:50 · answer #4 · answered by Ben 3 · 0⤊ 1⤋
Foil
1-3 1-4 2-3 2-4
good luck....
firsts
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2007-11-17 22:06:02 · answer #5 · answered by Lance B 1 · 0⤊ 1⤋
it cud be:
x^2 + 23x + 42
or:
x = -2 / x = - 21
2007-11-17 21:44:37 · answer #6 · answered by *Facepalm* 5 · 0⤊ 1⤋
x² + 21x + 2x + 42
x² + 23x + 42
2007-11-17 21:35:54 · answer #7 · answered by Como 7 · 2⤊ 1⤋
x*x +23x 42 (a+b)*(a+c) = a*a+(b+c)*a+
bc
2007-11-17 22:06:36 · answer #8 · answered by vaibhav j 1 · 0⤊ 1⤋