multiply (x+3)^2?
回答 (4)
2016-03-04 1:06 am
(x+3)² = (x+3).(x+3) = x*x + x*3 + 3*x +3*3 = x²+3x+3x+9 = x²+6x+9
when we have (a+b)² we say : its the sqare of the first a² more the two times the first times the second 2ab more the sqare of the second
(a+b)² = a² + 2ab+b²
when we have (a+b)² we say : its the sqare of the first a² more the two times the first times the second 2ab more the sqare of the second
(a+b)² = a² + 2ab+b²
2016-03-04 1:05 am
(x+3) *(x+3 )
Use the foil method to find the trinominal.
F: first.
x * x = x^2.
O: outside.
3x
I: inside
3x:
L: last
3 * 3 = 9
put it all together:
x^2 + 6x + 9.
Use the foil method to find the trinominal.
F: first.
x * x = x^2.
O: outside.
3x
I: inside
3x:
L: last
3 * 3 = 9
put it all together:
x^2 + 6x + 9.
2016-03-04 1:04 am
try (x+3)(x+3)
2016-03-04 1:04 am
6x
收錄日期: 2021-04-21 17:11:08
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