Find the root of the quadratic equation?
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4 or 0.25
Step-by-step explanation:
Let √x = a
Here,
⇒ 2√x + 2x⁻⁰°⁵ = 5
⇒ 2√x + 2( 1 / x⁰°⁵ ) = 5
⇒ 2√x + 2( 1 / √x ) = 5
⇒ 2a + 2( 1 / a ) = 5
⇒ 2a + 2/a = 5
⇒ ( 2a^2 + 2 ) / a = 5
⇒ 2a^2 + 2 = 5a
⇒ 2a^2 - 5a + 2 = 0
⇒ 2a^2 - ( 4 + 1 )a + 2 = 0
⇒ 2a^2 - 4a - a + 2 = 0
⇒ 2a( a - 2 ) - ( a - 2 ) = 0
⇒ ( a - 2 )( 2a - 1 ) = a
⇒ a = 2 or a = 1 / 2
So,
a = √x = 2 ⇒ x = 4
a = √x = 1 / 2 ⇒ x = 1/4
Hence, x = 4 or 1/4 or 0.25
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