Changes
From Karnataka Open Educational Resources
6 bytes added
, 11:51, 22 July 2014
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| =Hints for difficult problems = | | =Hints for difficult problems = |
| #If P & q are the roots of the equation 2a^-4a+1=0 find the value of | | #If P & q are the roots of the equation 2a^-4a+1=0 find the value of |
− | p^3+q^3 | + | p^3+q^3<br> |
| Pre requisites: | | Pre requisites: |
| #Standard form of quadratic equation | | #Standard form of quadratic equation |
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| #To find the sum of the roots of the quadratic equation using the formula | | #To find the sum of the roots of the quadratic equation using the formula |
| #To find the product of the roots of the equation | | #To find the product of the roots of the equation |
− | # Using the identity rewriting p^3+q^3 as (p+q)^3-3pq(p+q) | + | # Using the identity & rewriting p^3+q^3 as (p+q)^3-3pq(p+q) |
| #Substitute the values of m+n & mn in (p+q)^3-3pq(p+q) | | #Substitute the values of m+n & mn in (p+q)^3-3pq(p+q) |
| #Simplification | | #Simplification |