Identify the following please answer question number 23
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Answered by
1
Answer:
Using identity
(x+a) ( x+ b) = x^2+(a+b) x + ab
( 2x+3)( 2x+ 7)
=(2x)^2+(3+7) 2x+3×7
=4x^2+20x +21
Step-by-step explanation:
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Answered by
1
Answer:
X=-7/2 & X=-3/2
Step-by-step explanation:
2x=X
a=3
b=7
4x²+(10)2x+21=0
4x²+20x+21=0
4x²+6x+14x+21=0
2x(2x+3)+7(2x+3)=0
2x+7(2x+3)=0
X=-7/2&X=-3/2
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