chrislele92 chrislele92

22-08-2022
Mathematics

Answered

What is 4xx - 9 = 16

Answer :

profarouk profarouk

27-08-2022

Answer:

[tex]\{-\frac{5}{2}\ ,\ \frac{5}{2} \}[/tex]

Step-by-step explanation:

SOLVING THE EQUATION :

4x² - 9 = 16

⇔ 4x² = 16 + 9

⇔ 4x² = 25

⇔ 2² × x² = 25

⇔ (2x)² = 25

⇔ (2x)² = 5²

⇔ 2x = 5 or 2x = -5

⇔ x = 5/2 or x = -5/2

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