Қысқаша көбейту формулаларын қолданып, өрнектерді түрлендіру
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Mathematics
7th Grade
Used 206+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Упростите выражение:
Өрнекті ықшамда:
(3x - 2)(3x + 2) - (1 + x)(x - 1)=
8x2- 3
5x2- 3
8x2- 5
5x2- 5
Answer explanation
(3x - 2)(3x + 2) - (1 + x)(x - 1)=3x2-4-x2+1=8x2- 3
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Упростите выражение:
Өрнекті ықшамда:
6a - (4a - 3)2
-16a2 + 20a - 9
-16a2 + 30a - 10
-16a2 + 30a - 9
-8a2 + 30a - 9
Answer explanation
6a - (4a - 3)2=6a-16a2+24a-9=-16a2 + 30a - 9
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Решите уравнение:
Теңдеуді шеш:
(x - 5)2=5x2 - (2x - 1)(2x + 1)
1
2,4
2
3
Answer explanation
(x - 5)2=5x2 - (2x - 1)(2x + 1)
x5-10x+25=5x2-4x2+1
x5-x5-10x=1-25
-10x=-24
x=24:10
x=2,4
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Разложи на множители:
Көбейткішке жікте:
5a2-5b2
5(a+b)(a+b)
5(a-b)(a+b)
5(a-b)2
5(a-b)(a-b)
Answer explanation
5a2-5b2=5(a2-b2)=5(a-b)(a+b)
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Разложи на множители:
Көбейткішке жікте:
a3-a
a(a-1)(a+1)
a(a+1)(a+1)
a(a-1)2
a(a+1)2
Answer explanation
a3-a=a(a2-1)=a(a-1)(a+1)
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Разложи на множители:
Көбейткішке жікте:
4m3-4mn2
4m2(m+n)(m-n)
4m(m-n)2
4m2(m-n)
4m(m+n)(m-n)
Answer explanation
4m3-4mn2=4m(m2-n2)=4m(m+n)(m-n)
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Разложи на множители:
Көбейткішке жікте:
2m(a+b)+a+b
(2m-1)(a+b)
(2m+1)(a-b)
(2m+1)(a+b)
2m(a+b)
Answer explanation
2m(a+b)+a+b=2m(a+b)+1(a+b)=(2m+1)(a+b)
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