Answer:
x = ± [tex]\sqrt{5}[/tex]
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 = ± [tex]\sqrt{5}[/tex]
That is x = - [tex]\sqrt{5}[/tex] or x = [tex]\sqrt{5}[/tex] ← exact solutions
Answer:
Step-by-step explanation:
hello :
Question
3x²+x²=20
4x² = 20
x² =5
x= √5 or x= - √5
