下列哪个是完全平方公式？
(a + b)^2 = a^2 + 2ab + b^2
a^2 - b^2 = (a - b)(a + b)
(a - b)^2 = a^2 - 2ab + b^2
a^2 + b^2 = (a + b)^2
下列哪个是平方差公式？
(a - b)^2 = a^2 - 2ab + b^2
a^2 + b^2 = (a + b)^2
a^2 - b^2 = (a - b)(a + b)
(a + b)^2 = a^2 + 2ab + b^2
下列哪个是提取公因式？
(x + y)^2 = x^2 + 2xy + y^2
x^2 - y^2 = (x - y)(x + y)
x^2 + y^2 = (x + y)^2
2x + 4y = 2(x + 2y)
下列哪个是完全平方公式？
x^2 + y^2 = (x + y)^2
(x + y)^2 = x^2 + 2xy + y^2
x^2 - y^2 = (x - y)(x + y)
(x - y)^2 = x^2 - 2xy + y^2
下列哪个是平方差公式？
x^2 + y^2 = (x + y)^2
(x - y)^2 = x^2 - 2xy + y^2
(x + y)^2 = x^2 + 2xy + y^2
x^2 - y^2 = (x - y)(x + y)
下列哪个是提取公因式？
a^2 - b^2 = (a - b)(a + b)
(a + b)^2 = a^2 + 2ab + b^2
3a + 6b = 3(a + 2b)
a^2 + b^2 = (a + b)^2
下列哪个是完全平方公式？
m^2 - n^2 = (m - n)(m + n)
(m + n)^2 = m^2 + 2mn + n^2
m^2 + n^2 = (m + n)^2
(m - n)^2 = m^2 - 2mn + n^2
下列哪个是平方差公式？
(m - n)^2 = m^2 - 2mn + n^2
m^2 - n^2 = (m - n)(m + n)
m^2 + n^2 = (m + n)^2
(m + n)^2 = m^2 + 2mn + n^2
下列哪个是提取公因式？
(x + y)^2 = x^2 + 2xy + y^2
4x + 8y = 4(x + 2y)
x^2 - y^2 = (x - y)(x + y)
x^2 + y^2 = (x + y)^2
下列哪个是完全平方公式？
(p + q)^2 = p^2 + 2pq + q^2
p^2 + q^2 = (p + q)^2
(p - q)^2 = p^2 - 2pq + q^2
p^2 - q^2 = (p - q)(p + q)