Question

Resolva o cálculo usando o quadrado da soma de dois termos

a)
$(2 + x) {}^{2}$
b)
$(x + 3) {}^{2}$
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Answer 1

a)
2.2+ x2+2.2.x
4+ x2+ 4x
Delta= 4.4 -4.1.4
Delta= 16 - 16
Delta= 0

X= -4/2
X= -2

b) x2+ 9+ 2.3.x
x2+9+6x