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Intan
Intan

Malaysia

please help

Date Posted: 4 years ago
Views: 304

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
An idea goes like this
Non-substitution method:
x - 5√x + 6 = 0
x + 6 = 5√x
(x + 6)² = (5√x)²
x² + 12x + 36 = 25x
x² - 13x + 36 = 0
(x - 9)(x - 4) = 0
x = 9 or x = 4
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J
J's answer
1024 answers (A Helpful Person)