Question

qual e o resultado desta conta 5y2-40=0

Answer 1

5y²-40 =0
5y²=40
y²=40/5
y= raiz(8)

y= raiz(4x2)
y= raiz(2²x2)
y= 2raiz(2)

Answer 2

$Resolu\c{c}\~ao \to \left\{\begin{array}{ccc}5y^2-40=0\\\\5y^2=40\\\\y^2 = \frac{40}{5}\\\\y^2 = 8\\\\y = \pm\sqrt{8}\\\\y = \pm\sqrt{2^2*2\\\\y = \pm2\sqrt{2}}\\\\\boxed{\boxed{S = \{-2\sqrt{2},2\sqrt{2}\}}}\end{array}\right$

Espero ter ajudado. =^.^=