Question

solve for x and give your answer correct to two decimal places

5x(x+2)=3​

Answer 1

5x(x+2)=3

5x(x)+5x(2)=3

5x2+10x=3

5x2+10x−3=0

Here,

a=5,b=10,c=−3

Now, by quadratic formula, we have

x=2×5−10±(10)2−(4×(5)×(−3)) 

⇒x=10−10±100+60

⇒x=10−10±410

⇒x=5−5±210

Hence for the given expression,

x=5−5±210.