Question

solve for x : sqrt(5-x)=5-x^2​

Answer 1

Step-by-step explanation:

squaring both sides ,we have :

=5-x= (5-x²)² = 25 - 10x² + x⁴

adding x -5 to both sides, we have

x⁴- 10 x²+ x + 20 = 0

factoring (x²+x -5) (x²-x-4)= 0