Question

find the roots for 0²+0+0 using quadratic formula

Answer 1

Solution

i) 

x2−3x−10=0

⇒x2−5x+2x−10=0

⇒x(x−5)+2(x−5)=0

⇒(x+2)(x−5)=0

⇒x=5,−2

ii) 

2x2+x−6=0

⇒2x2+4x−3x−6=0

⇒2x(x+2)−3(x+2)=0

⇒(x+2)(2x−3)=0

⇒x=23,−2

iii) 

2x2+7x+52=0

⇒2x2+2x+5x+52=0

⇒2x(x+2)+5(x+