Question

Dadas as afirmações :

I) (x+5)² = x² + 10x + 25

II) (x+3).(x-3) = x² + 9

III) (x + 2). (x + 3) = x² + 5x + 6

IV) (x + 2)² = x² + 4x + 4

a) V,F,F,V
b) V,V,V,V
c) V,F,V,V
d) V,V,F,F
e) V,V,F,V



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Answer 1

Resposta:

c) V,F,V,V

Explicação passo-a-passo:

I) (x+5)²

= x² +2.5.x + 5²

= x² + 10x + 25 (v)

---------------

II) (x+3).(x-3)

= x.x -3x+3x-3.3

= x² - 9

x² + 9

(F)

----------------------

III) (x + 2). (x + 3)

= x²+3x+2x+2.3

= x² + 5x + 6 (v)

--------------

IV) (x + 2)²

= x² +2.2x + 2²

= x² + 4x + 4 (v)

_________

R.:

(C) V,F,V,V