因式分解(1)4a^2-1(2)x^2-25(3)a^2 -1

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因式分解(1)4a^2-1(2)x^2-25(3)a^2-1因式分解(1)4a^2-1(2)x^2-25(3)a^2-1因式分解(1)4a^2-1(2)x^2-25(3)a^2-1(1)4a^2-1=

因式分解(1)4a^2-1(2)x^2-25(3)a^2 -1
因式分解(1)4a^2-1
(2)x^2-25
(3)a^2 -1

因式分解(1)4a^2-1(2)x^2-25(3)a^2 -1
(1)4a^2-1=(2a+1)(2a-1)
(2)x^2-25=(x+5(x-5)
(3)a^2 -1=(a+1)(a-1)

(1)4a²-1=(2a)²-1²=(2a+1)(2a-1)
(2)x²-25=x²-5²=(x+5)(x-5)
(3)a²-1=a²-1²=(a+1)(a-1)

(1)4a^2-1
=(2a)²-1
=(2a+1)(2a-1)
(2)x^2-25
=x²-5²
=(x-5)(x+5)
(3)a^2 -1
=(a-1)(a+1)