Question 3:
Solve the following quadratic equations by using quadratic formula. Give your answer in four significant figures.
(a) (x+1)(x−5)=15(b) x2+3x−2x2−x−1=3
Solution:
Solve the following quadratic equations by using quadratic formula. Give your answer in four significant figures.
(a) (x+1)(x−5)=15(b) x2+3x−2x2−x−1=3
Solution:
Question 4:
If the roots of 2x2+4x−1=0 are α and β, find the equations whose roots are
(a) α2,β2(b) α−β,β−α
Solution:
If the roots of 2x2+4x−1=0 are α and β, find the equations whose roots are
(a) α2,β2(b) α−β,β−α
Solution:
Question 5:
Write and simplify the equation whose roots are double the roots of 3x2−5x−1=0 , without solving the given equation.
Solution:
Write and simplify the equation whose roots are double the roots of 3x2−5x−1=0 , without solving the given equation.
Solution: