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CBSE Class 10 Answered

straight x squared plus 5 straight x plus 6 equals 0 Find the roots.
Asked by sagarmishra | 01 Mar, 2018, 06:51: PM
answered-by-expert Expert Answer
To tackle such problems, follow the steps given below:
1) Compare it with the standard quadratic equation ax squared plus bx plus straight c equals 0
Here,
a=1, b=5, c=6.
 
2) Split 'b' into two numbers whose sum is 'b' and product is 'ac'.
3) Factorise and solve.
 
Calculations:
straight x squared plus 5 straight x plus 6 equals 0
straight x squared plus 3 straight x plus 2 straight x plus 6 equals 0
straight x left parenthesis straight x plus 3 right parenthesis plus 2 left parenthesis straight x plus 3 right parenthesis equals 0
left parenthesis straight x plus 3 right parenthesis left parenthesis straight x plus 2 right parenthesis equals 0
straight x equals negative 3 comma space straight x equals negative 2
Answered by | 01 Mar, 2018, 06:58: PM
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