Po opuszczeniu nawiasu − ( x − y + 2 ) -\left(x-y+2\right) − ( x − y + 2 ) otrzymamy:

Mnożenie sum algebraicznych

Authored by Marta Kłaczek

Mathematics

7th - 9th Grade

Used 204+ times

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8 questions

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Wynikiem mnożenia $-2x\left(x-3y\right)$ jest:

$-2x^2+6xy$

$-2x^2-6xy$

$-2x+6xy$

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Wynikiem działania $\left(a-2\right)\left(5a+3b\right)$ jest:

$5a+3ab-10a+6b$

$5a^2+3ab-10a+6b$

$5a^2+3ab-10a-6b$

$-30a^2b$

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Wynikiem działania $\left(y-4x\right)\left(-2x+y\right)$ jest:

$y-4x-2x+y$

$8x^2+y^2-8xy$

$8x^2+2y-6xy$

$8x^2+y^2-6xy$

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Wyrażenie $\left(4a-b\right)\left(a+2b\right)$ przedstawione w najprostszej postaci, to:

$4a^2+7ab-2b^2$

$4a+7ab-2b$

$4a^2+9ab+2b^2$

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Wyrażenie $\left(4-3x\right)\left(x+y-1\right)$ po uproszczeniu ma postać:

$7x-3xy+4y-4-3x^2$

$4-3x+x+y-1$

$7x+4y+4-3x^2+3xy$

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Po opuszczeniu nawiasu $-\left(x-y+2\right)$ otrzymamy:

$-x-y+2$

$-x+y+2$

$-x+y-2$

$x+y-2$

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Pole prostokąta możemy zapisać:

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

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

$2x^2+2x-x-1$

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Pole trójkąta, to:

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

$\frac{1}{2}\left(6x^2+12x\right)$

$\frac{3}{2}x\left(2x+4\right)$

$\frac{1}{2}x\left(3x+6\right)\$

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Mnożenie sum algebraicznych

Wynikiem mnożenia −2x(x−3y)-2x\left(x-3y\right)−2x(x−3y) jest:

Wynikiem działania (a−2)(5a+3b)\left(a-2\right)\left(5a+3b\right)(a−2)(5a+3b) jest:

Wynikiem działania (y−4x)(−2x+y)\left(y-4x\right)\left(-2x+y\right)(y−4x)(−2x+y) jest:

Wyrażenie (4a−b)(a+2b)\left(4a-b\right)\left(a+2b\right)(4a−b)(a+2b) przedstawione w najprostszej postaci, to:

Wyrażenie (4−3x)(x+y−1)\left(4-3x\right)\left(x+y-1\right)(4−3x)(x+y−1) po uproszczeniu ma postać: