QUIZ
Descompuneri in factori(cu formule de calcul prescurtat) -PH
4 months ago by
16 questions
Q.

Descompunand 4x2+12x+9 veti obtine:

answer choices

(2x+1)2

(3x+1)2

(2x+3)2

(2x+3(2x-3)

Q.

Descompunad 25x2-40x+16 veti obtine:

answer choices

(5x-8)2

(5x-4)2

(5x-2)2

(5x-4)(5x+4)

Q.

Restrângeți $x^2+8x+16$

answer choices

$\left(x+4\right)^2$

$\left(x+8\right)^2$

$\left(x+2\right)^2$

$\left(x+16\right)^2$

Q.

Restrângeți $4x^2+12x+9$

answer choices

$\left(2x+3\right)^2$

$\left(4x+3\right)^2$

$\left(2x+6\right)^2$

$\left(2x+9\right)^2$

Q.

Descompunand x2 + 12x + 36 veti obtine:

answer choices

(x + 12)2

(x - 6)2

(x + 6)2

$\left(x+6\right)\left(x-6\right)$

Q.

$Descompuneti\ 16a^2-25b^2$

answer choices

(4a +5b)(4a - 5b)

(5a - 4b)(5a + 4b)

(16a - 25b)(16a +25b)

$\left(4a+5b\right)^2$

Q.

$Descompunand\ \ \ 81x^2-49\ \ veti\ obtine:\$

answer choices

(9x-7)(9x+7)

(3x+7)(3x-7)

(9x+8)(9x-8)

$\left(9x-7\right)^2$

Q.

$Descompuneti\ 7a^2-5$

answer choices

$\left(7a-5\right)\left(7a+5\right)$

$\left(\sqrt{7}a-\sqrt{5}\right)^2$

$\left(\sqrt{7}a-\sqrt{5}\right)\left(\sqrt{7}a\ +\sqrt{5}\right)$

$\left(\sqrt{7}a-5\right)\left(\sqrt{7}a+5\right)$

Q.

$3x^2-2\sqrt{3}+1=$

answer choices

$\left(3x-1\right)^2$

$\left(\sqrt{3}x-1\right)^2$

$\left(\sqrt{3}x\ +1\right)^2$

$\left(3x-1\right)^2$

Q.

$x^2-2+\frac{1}{x^2}$

answer choices

$\left(x-\frac{1}{x}\right)^2$

$\left(x+\frac{1}{x}\right)^2$

$\left(x+\frac{1}{x}\right)\left(x-\frac{1}{x}\right)$

$\left(x-\sqrt{2}\right)^2$

Q.

$\frac{25}{4}x^2+5x+1$

answer choices

$\left(\frac{5}{4}x^{ }+1\right)^2$

$\left(\frac{5}{2}x+1\right)^2$

$\left(5x+1\right)^2$

$\left(\frac{5}{2}x^{ }-1\right)^2$

Q.

(x+4)2-25 este egal cu

answer choices

(x+2)(x+5)

(x-1)(x+9)

(x-9)(x+1)

$\left(x-1\right)^2$

Q.

(2x-5)2-(x+6)2 este egal cu

answer choices

(x+5)(3x+3)

(x-11)(3x+1)

(3x+1)(x+5)

$\left(3x+1\right)^2$

Q.

$9(x+2)^2-4(x+3)^2$

answer choices

$x\left(5x+12\right)$

$\left(5x-6\right)\left(13x+30\right)$

$\left(5x+12\right)^2$

$\left(3x+6\right)\left(2x+6\right)$

Q.

$Descompunand\ 106^2-94^2\$  folosind formulele de calcul prescurtat veti obtine:

answer choices

1200

2400

12000

4800

Q.

$Descompunand\ 105^2-2\cdot105\cdot95\ +95^2$  folosind formulele de calcul prescurtat veti obtine:

answer choices

40000

2000

25

100

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