试题与答案

解方程 (1)用配方法解方程:3x2-1=4x.2x2+5x-1=0(用公式法)

题型:解答题

题目:

解方程

(1)用配方法解方程:3x2-1=4x.2x2+5x-1=0(用公式法)

(2)用适当方法解下列方程:

2(x-3)2=x2-9(x+1)(x-3)=12

(5x-3)2+2(3-5x)=04x(2x-1)=1-2x.

答案:

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It was in my high school science class. I was doing a task in front of the classroom with my favorite shirt on.
A     came, “Nice shirt,” I smiled from ear to ear. Then another voice said, “That shirt belonged to my dad. Greg’s mother works for my family. We were going to      that shirt away, but gave it to her     .”I was speechless. I wanted to hide.
I      the shirt in the back of the closet and told my mum what had happened. She then dialed her        , “I will no longer work for your family,” she told him. That night, Mom told my dad that she couldn’t clean anymore; she knew her life’s      was something greater.
The next morning she       with the personnel manager at the Board of Education. He told her that without a proper education she could not teach. So mom decided to      a university.
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For almost five years, as a teacher’s assistant, she saw teacher after teacher give up on the children and quit, feeling      . Then one day, the personnel manager and the principal   __  _  in her classroom. The principal said, “We have watched how you       the children and how they communicate with you and admire your hard – working       over the last five years. We are all in agreement that you       be the teacher of this class.”
My mom spent more than 20 years there.      her career, she was voted Teacher of the Year. All of this came about because of the       comment made in the classroom that day. Mom showed me how to handle       situations and never give up.
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