find 2x+5 if x satisfies √40-9x -2√7-x =√-x​

Solve by first completing the square.x2+2x−2=0𝑥2+2𝑥−2=0x=𝑥=  +√+ or x=𝑥=  −√−

Evaluate  3√40 − √90 − 4√40

If x = 12−√3 find the value of x3 – 2x2 – 7x + 5

Multiply the radical expressions and simplify your answer.−36x6y3−−−−−√⋅210xy6−−−−−√−36𝑥6𝑦3⋅210𝑥𝑦6Select one:a. −12x3y415xy−−−−√−12𝑥3𝑦415𝑥𝑦b. −1215x7y9−−−−−−√−1215𝑥7𝑦9c. −24x3y415xy−−−−√−24𝑥3𝑦415𝑥𝑦d. −24xyx5y7−−−−√

If √2=1.4142, find the value of √2 − 1√2 + 1