Question

Punctele b,c,d,e,f inafara de a plss cat mai repede rezolvare completa dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

b)

x^2 = 4*36 = 144

x = 12 sau -12

c)

3x^2 = 9

x^2 = 3

x = √3 sau - √3

d)

4x^2 = 20

x^2 = 5

x = √5 sau -√5

e)

x^2 = 3*75/2 = 225/2

x = 15/√2 = 15√2/2 sau -15√2/2

f)

x^2√3 = 6√3

x^2 = 6

x = √6 sau -√6

Answer 2

$\it b)\ \dfrac{x^2}{4}=36 \Rightarrow x^2=4\cdot36 \Rightarrow x^2=144 \Rightarrow \sqrt{x^2}=\sqrt{144} \Rightarrow |x|=12 \Rightarrow \\ \\ \Rightarrow x=\pm12 \Rightarrow x_1=-12,\ \ x_2=12\\ \\ \\ f)\ x^2\sqrt3=6\sqrt3|_{:\sqrt3} \Rightarrow x^2=6 \Rightarrow \sqrt{x^2}=\sqrt6 \Rightarrow |x|=\sqrt6 \Rightarrow x=\pm\sqrt6$