Question

Encontre cada valor das expressões algébricas
Me ajudaaa

Answer 1

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$\tt{a)}~\sf{\sqrt{b^2-4ac}\Bigg|_{a=2,b=0,c=-2}=\sqrt{0^2-4\cdot2\cdot(-2)}=\sqrt{16}=4}\\\tt{b)}~\sf{\sqrt{b^2-4ac}\Bigg|_{a=3,b=10,c=3}=\sqrt{10^2-4\cdot3\cdot3}=\sqrt{100-36}=\sqrt{64}=8}\\\tt{c)}~\sf{\sqrt{b^2-4ac}\Bigg|_{a=2,b=14,c=0}=\sqrt{14^2-4\cdot2\cdot0}=\sqrt{196}=14}\\\tt{d)}~\sf{s+vt-\dfrac{at^2}{2}\Bigg|_{s=3~v=-4~t=5~a=8}=3-4\cdot5-\dfrac{\diagup\!\!\!8\cdot5^2}{\diagup\!\!\!2}}\\\sf{s+vt-\dfrac{at^2}{2}\Bigg|_{s=3~v=-4~t=5~a=8}=3-20-4\cdot100=3-20-400=-417}$

Answer 2

Oie, Td Bom?!

A.

$= \sqrt{b {}^{2} - 4ac}$

$= \sqrt{0 {}^{2} - 4 \: . \: 2 \: . \: ( - 2)}$

$= \sqrt{0 + 16}$

$= \sqrt{16}$

$= 4$

B.

$= \sqrt{b {}^{2} -4 ac}$

$= \sqrt{10 {}^{2} - 4 \: . \: 3 \: . \: 3}$

$= \sqrt{100 - 36}$

$= \sqrt{64}$

$= 8$

C.

$= \sqrt{b {}^{2} - 4ac}$

$= \sqrt{14 {}^{2} - 4 \: . \: 2 \: . \: 0}$

$= \sqrt{14 {}^{2} - 0}$

$= \sqrt{14 {}^{2} }$

$= 14$

D.

$= s + vt - \frac{at {}^{2} }{2}$

$= 3 + ( - 4) \: . \: 5 - \frac{8 \: . \: 5 {}^{2} }{2}$

$= 3 + ( - 4) \: . \: 5 - 4 \: . \: 5 {}^{2}$

$= 3 - 20 - 4 \: . \: 5 {}^{2}$

$= 3 - 20 - 4 \: . \: 25$

$= 3 - 20 - 100$

$= 3 - 120$

$= - 117$

Att. Makaveli1996