Use till 1
(x + 3) (x + 7)
Answers
Answered by
4
Answer:
x²+10x+21
is the solution of the question
Answered by
1
Step-by-step explanation:
(x + 3)(x + 7)
=x(x + 7)+3(x + 7)
=x^2+7x +3x + 21
=x^2+10x+7
=x^2+( 7 + 3 )x +21
=x^2+7x+3x+21
=x(x + 7)+3(x + 7)
=(x+7)(x+3)
Either,
x+7=0
>> x= -7
or
x+3=0
>>x= -3
Therefore the value of x is -7 & -3
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