1)√х+4-√6-х=2 2)√5-4х=2-х

Question

1)√х+4-√6-х=2
2)√5-4х=2-х

Answer 1

1) √x + 4 - √6 - x = 2
x + 4 - ( 6 - x) = 2²
x + 4 - 6 + x = 4
2x = 4 + 2
2x= 6
x = 6/2
x = 3

2) √5 - 4x = 2 - x
5 - 4x = ( 2 - x)²
5 - 4x = ( 2 - x)( 2 - x)
5 - 4x = 4 - 4x + x²
5 - 4x - 4 + 4x - x² = 0
- x² + 1 = 0
- x² = - 1
x² = 1
x = 1
x = - 1

Comments

(2-х)(2-х)???чи (2-х)(2+х)

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менi потрiбно з перевiркою

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( 2 - х)(2 - х),в условии не просили сделать провеку