Question

2) 4. 5.
m. 3. =22
then find the value of m.
(iii)
Solve the following quadratic equation :
x2 + 8x + 15 = 0.

it is not x2 it is x square​

Answer 1

Answer:

iii)

x2 + 5x + 3x +15 = 0

x ( x+5 ) + 3 ( x+5) = 0

(x+3) (x+5) = 0

x = -3 or -5

it can also be solved as

x2 - 5x - 3x + 15 =0

but while factorising we select the sign according to the 3rd digit i.e. 15

Answer 2

2)m=22/(4*5*3)=11/30

iii) x^2+3x+5x+15=0

    x(x+3)+5(x+3)=0

   (x+5)(x+3)=0

    x=-5 or -3

#BAL #answerwithquality