HOC24
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Bài học
mine
his
yours
ours
hers
theirs
is yours
his - hers
\(4x+8+x+2\\ =4\left(x+2\right)+1.\left(x+2\right)\\ =\left(x+2\right)\left(4+1\right)\)
Đề là +8 mới phân tích được nhé!
When I met him, he was wearing boots.
In 1984, John studied at the university.
I wrote my report at 8 o'clock last night.
Mary did her homework at 5 o'clock this afternoon.
It was raining when we went out.
She bought some food at the supermarket when she saw him.
The thief brought the TV away before we got home.
\(=-\left(x^2-7x+19\right)=-\left(x^2-2.\dfrac{7}{2}x+\dfrac{49}{4}+\dfrac{27}{4}\right)\\ =-\left(x-\dfrac{7}{2}\right)^2-\dfrac{27}{4}\le-\dfrac{27}{4}\)
GTLN đạt \(-\dfrac{27}{4}\) khi \(x=\dfrac{7}{2}\)
B
A