Question

3x^2+x^2=20 (3x squared+ x squared = 20)

Answer 1

Answer:

Step-by-step explanation:

hello :

Question

3x²+x²=20

4x² = 20

x² =5

x=  √5 or x=  - √5

Answer 2

Answer:

x = ± $\sqrt{5}$

Step-by-step explanation:

Given

3x² + x² = 20, that is

4x² = 20 ( divide both sides by 4 )

x² = 5 ( take the square root of both sides )

x = ± $\sqrt{5}$

That is x = - $\sqrt{5}$ or x = $\sqrt{5}$ ← exact solutions