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4x² -20=09
what answer ​


Sagot :

Answer:

x=2.69

Step-by-step explanation:

4x²-20=9

4x²=20+9

4x²=29

[tex]\frac{4x^2}{4} =\frac{29}{4}[/tex] (cancel both 4s on the left side of the equation)

[tex]x^2= 7.25\\\sqrt{x^2} =\sqrt{7.25} \\x=2.69[/tex]