x²-x(√7-2)-2√7=0
D= (√7-2)²+4*2√7= 7-4√7+4+8√7= 7+4√7+4= (√7+2)²
x1= (√7-2+√7+2)/2= 2√7/2= √7
x2= (√7-2-√7-2)/2= -4/2= -2
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
x²-x(√7-2)-2√7=0
D= (√7-2)²+4*2√7= 7-4√7+4+8√7= 7+4√7+4= (√7+2)²
x1= (√7-2+√7+2)/2= 2√7/2= √7
x2= (√7-2-√7-2)/2= -4/2= -2