Question

Resolva as expressões abaixo:
a- √49 + √16=
b- 3√5 + 2√7 – 5√5 + √7 + 4√7=
c- √25 + 3√27 +4√81=
d- √20 + √45=
e- √12 + √75 + √108=

Answer 1

a- √49 + √16=7+4=11

b- 3√5 + 2√7 – 5√5 + √7 + 4√7=5√7

c- √25 +3√27+4√81

=5+3.3√3+4.9=5+9√3+36=41+9√3

d- √20 + √45=2√5+3√5=5√5

e- √12 + √75 + √108=2√3+5√3+6√3=13√3

Answer 2

Oie, Td Bom?!

a)

$\sqrt{49} + \sqrt{16}$

$7 + 4$

$11$

b)

$3 \sqrt{5} + 2 \sqrt{7} - 5 \sqrt{5} + \sqrt{7} + 4 \sqrt{7}$

$- 2 \sqrt{5} + 7 \sqrt{7}$

c)

$\sqrt{25} + 3 \sqrt{27} + 4 \sqrt{81}$

$5 + 9 \sqrt{3} + 4 \times 9$

$5 + 9 \sqrt{3} + 36$

$41 + 9 \sqrt{3}$

d)

$\sqrt{20} + \sqrt{45}$

$2 \sqrt{5} + 3 \sqrt{5}$

$(2 + 3) \sqrt{5}$

$5 \sqrt{5}$

e)

$\sqrt{12} + \sqrt{75} + \sqrt{108}$

$2 \sqrt{3} + 5 \sqrt{3} + 6 \sqrt{3}$

$(2 + 5 + 6) \sqrt{3}$

$13 \sqrt{3}$

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