solve the following .(39÷3)+7
Answers
Answered by
0
Answer:
3
x
2
−7.22x+3.9
−9
3
)(log(7−x))=0
⇒3
x
2
−7.2x+3.9−9
3
=0 (assuming log(7−x)
=0)
⇒3
x
2
−7.2x+3.9
=3
2+
2
1
⇒x
2
−7.2x+3.9=2.5
⇒x
2
−7.2x+1.4=0
⇒x=
2×1
1±
(7.2)
2
−4×1×1.4
⇒x=
2
1
±
11.56
=
2
1
±3.4
=3.9−2.9
if log(7−x)=0
⇒7−x=1
⇒x=6
x=6,3.9,−2.9
Step-by-step explanation:
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Answered by
2
Step-by-step explanation:
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