Question

solve the following by completing the square method
1. x^2 + 11x + 30 = 0
2. 3x^2 - 10x + 3 = 0
3. 4x^2 + 15x - 19 = 0

please please please help me out...........​

Answer 1

Answer:

completing the square method is deleted foe this years tenth class

you are nit needed to refer to that

Answer 2

Step-by-step explanation:

i) x^2+11x+30 ,this can also be written as

=x^2+2×X×11/2+(11/2)^2-(11/2)^2+30=0

[split the term according to the identity (a+b)^2=a^2+2ab+b^2]

so ,

=x^2+2×X×(11/2)^2=(11/2)^2-30

we get ,

(x+11/2)^2=1/4

x+11/2=+_1/2

when we take x+11/2=1/2, then we get value of x=-5

when we take x+11/2=-1/2 ,then we get x=-6

so the zeroes of the given quadratic equation are [-5,-6]

other questions can also be solved in this way

I hope it helps you