4) Fatore as diferença de quadrados:
a)x^2-4=
b)a^2-36=
c)y^2-1
d)25x^2-4
e)1/100a^2-1/49=
a)x^2-4=
b)a^2-36=
c)y^2-1
d)25x^2-4
e)1/100a^2-1/49=
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b) (a - 6) ( a + 6)
c) (y - 1) (y + 1)
d) (5x - 2) (5x + 2)
e) (1/10a - 1/7) (1/10a + 1/7)
a)x^2-4 = (x+2)(x-2)
b)a^2-36 = (a+6)(a-6)
c)y^2-1= (y+1)(y-1)
d)25x^2-4 = (5x+2)(5x-2)
e)1/100a^2-1/49= = (1/10a+1/7)(1/10a-1/7)