NCERT MATHS CLASS - X
Quadratic Equations
Quadratic Equations
Exercise 4.2
Question 1:
Find the roots of the following quadratic equations by factorisation:
Sol.
Roots of this equation are the values for which (x─5)(x+2)= 0
(x─5) = 0 or (x+2)= 0= 0
i.e., x = 5 or x = −2
Roots of this equation are the values for which (x +2)(2x ─ 3)= 0
i.e., x = −2 or x = 3/2
Roots of this equation are the values for which (√2+5)(x+√2) = 0
∴ (√2+5) = 0 or (x+√2) = 0
i.e., x =
or x = ─√2
Roots of this equation are the values for which (4x─1)2 = 0
Therefore, (4x─1) = 0 or (4x─1) =0
i.e.,
Roots of this equation are the values for which (10x ─1)2 = 0
Therefore, (10x ─1) = 0 (10x ─1) = 0
i.e.,
