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8th
grade

Mathematics

80%

accuracy

25

plays

User image

4 years

Mathematics

8th

grade

Descompunerea în factori prin folosirea formulelor de calcul prescurtat

user

25
plays

10 questions

10 questions

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1. Multiple Choice
1 minute
1 pt
Prin restrângere, $a^2+2\cdot a\cdot b+b^2$ devine
$\left(a-b\right)^2$
$\left(a+b\right)^2$
2. Multiple Choice
1 minute
1 pt
Prin restrângere, expresia $a^2-2\cdot a\cdot b+b^2$ devine
$\left(a-b\right)^2$
$\left(a+b\right)^2$
3. Multiple Choice
1 minute
1 pt
Expresia $a^2-b^2$ se descompune în
$\left(a-b\right)^2$
$\left(a-b\right)\cdot\left(a+b\right)$
4. Multiple Choice
2 minutes
1 pt
$x^2+4x+4$ =
$\left(x+2\right)^2$
$\left(x-2\right)^2$
5. Multiple Choice
2 minutes
1 pt
$x^2-6x+9\ =$
$\left(x-3\right)^2$
$\left(x+3\right)^2$
6. Multiple Choice
1 minute
1 pt
$a^2-64=$
$\left(a-8\right)^2$
$\left(a-8\right)\cdot\left(a+8\right)$
7. Multiple Choice
3 minutes
1 pt
4x² + 12x + 9
descompus în factori:
(4x+9)²
(2x+3)²
8. Multiple Choice
5 minutes
1 pt
(3x – 2)² – 25
descompus în factori:
(3x - 7) ⋅ (3x + 3)
(3x - 27)²
9. Multiple Choice
3 minutes
1 pt
Descompus în factori , $49-36x^2$ este
$\left(7-6x\right)\cdot\left(7+6x\right)$
$\left(7-6x\right)^2$
10. Multiple Choice
5 minutes
1 pt
(5x – 2)² – (3x + 5)²
descompus în factori:
(3x + 3)²
(2x - 7) ⋅ (8x + 3)
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