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valdineia2525:
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(x+1)^2= (x+1).(x+1)
x^2+x+x+1
x^2+2x+1
b)
(x-10)^2= (x-10).(x-10)
x^2-10x-10x+100
x^2-20x+100
c)
(3x+4x)^2= (3x+4).(3x+4)
9x^2+12x+12x+16
9x^2+24x+16
d)
(5-x)^2= ( 5-x).(5-x)
25-5x-5x+x^2
25-10x+x^2
x^2+x+x+1
x^2+2x+1
b)
(x-10)^2= (x-10).(x-10)
x^2-10x-10x+100
x^2-20x+100
c)
(3x+4x)^2= (3x+4).(3x+4)
9x^2+12x+12x+16
9x^2+24x+16
d)
(5-x)^2= ( 5-x).(5-x)
25-5x-5x+x^2
25-10x+x^2
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