Question

Calcule o valor das expressões considerando as igualdades abaixo:
$\sqrt{10} =3,16$ $\sqrt{x} =3,32$ $\sqrt{7} =2,64$

a)3$\sqrt{250}$-4$\sqrt{90}$
B)2$\sqrt{99}$+2$\sqrt{44}$+5$\sqrt{7} - \sqrt{63}$

Answer 1

Dados:
√10=3,16
√11=3,32
√7=2,64



√250=√2.5³=5√2.5=5√10

√90=√2.3².5=3√10

√99=√3².11=3√11

√44=√2².11=2√11

√63=√3².7=3√7


a)
 3√250-4√90=
=3.5√10-4.3√10
=15√10-12√10
=3√10
=3.3,16
=9,48

b)
 2√99+2√44+5√7-√63=
=2.3√10+2.2√11+5√7-3√7
=6√10+4√11+2√7
=6.3,16+4.3,32+2.2,64
=18,96+13,28+5,28
=37,52