If x= 2-√5/2+√5 and y= 2+√5/2-√5, find the value of (x*x)-(y*y)
Abcd , 7 Years ago
Grade 9
9 grade maths> If x= 2-√5/2+√5 and y= 2+√5/2-√5, find th...
1 Answers
Arun
Last Activity: 7 Years ago
Dear student
x = 2-√5/2+√5
on rationalization
x = (4 + 5 – 4 √5) / – 1
x = 4 √5 – 9
Now similarly y = – 4 √5 – 9
Now question is asked for x^2 – y^2
= (x+y) * (x – y)
= – 18 * 8 √5
= – 144√5
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Other Related Questions on 9 grade maths
In the figure (not to scale) AB = CD, angle DAP = angle DPA and A,B,C,D are concycli. If angle ADC = 80°, then find angle ACD.
In the figure (not to scale) AB = CD, angle DAP = angle DPA and A,B,C,D are concycli. If angle ADC = 80°, then find angle ACD.
9 grade maths
1 Answer Available
Last Activity: 3 Years ago
What length of tarpaulin 3m wide will be required to make conical tent of height 8m and base radius 6m ? Assume that the extra length of material that will be required for stitching and wastage in cutting is approximately 20cm ( Use pi= 3.14)
What length of tarpaulin 3m wide will be required to make conical tent of height 8m and base radius 6m ? Assume that the extra length of material that will be required for stitching and wastage in cutting is approximately 20cm ( Use pi= 3.14)
9 grade maths
1 Answer Available
Last Activity: 3 Years ago