Ungkapan Algebra

Diberi k=3 dan n=4, cari nilai bagi 2n - 5k.

• -7

• -5

• 5

• 7

Answer explanation

Substitute k=3 and n=4 into the expression 2n - 5k to get 2(4) - 5(3) = 8 - 15 = -7. Therefore, the correct answer is -7.

Permudahkan ( 4m + 5n ) - ( 2m - 6)

• 4m + 5n - 6

• 4m + 5n + 6

• 2m + 5n - 6

• 2m + 5n + 6

Answer explanation

To simplify (4m + 5n) - (2m - 6), distribute the negative sign inside the parentheses to get 4m + 5n - 2m + 6. Combine like terms to get 2m + 5n + 6, which is the correct answer choice.

Permudahkan 3x²y x (5xyz²⁾

• 15x³y²z²

• -15x³y²z²

• 15x²z²

• -15x²z²

Answer explanation

To simplify 3x^2y x (5xyz^2), multiply the coefficients (3 and 5) to get -15, then combine the variables x^2 and x to get x^3, y and y to get y^2, and z and z^2 to get z^2. Therefore, the answer is -15x^3y^2z^2.

Permudahkan 12p²q ÷ ( 4pq - pq )

• 2p

• 4p

• -2pq

• -4pq

Answer explanation

To simplify 12p^2q ÷ (4pq - pq), first simplify the denominator to 3pq. Then, divide 12p^2q by 3pq to get 4p as the final answer.

Antara berikut yang manakah pasangan sebutan serupa ?

• -0.3xy² dan 2/7 y²x

• 2c dan 2c²

• 5x dan 5y

• a³b dan ab³

Answer explanation

Pasangan sebutan serupa adalah -0.3xy^2 dan 2/7 y^2x karena keduanya memiliki variabel yang sama dengan pangkat yang sama, meskipun urutannya berbeda.

Permudahkan (2x²y)(-3xy)

• -6x³y²

• 6x³y²

• -6x²y

• 6x²y

Answer explanation

To simplify (2x^2y)(-3xy), multiply the coefficients (-2*3 = -6) and the variables (x^2 * x = x^3, y * y = y^2), giving -6x^3y^2 as the result.

Hitung (7a + 3b) - (4a - 2b)

• 3a + 5b

• 3a - 5b

• 11a + b

• 11a - b

Answer explanation

To simplify (7a + 3b) - (4a - 2b), distribute the negative sign inside the parentheses. This results in 7a + 3b - 4a + 2b. Combine like terms to get 3a + 5b.

Apakah yang sama antara -2x²y dan 5xy² ?

• x

• y

• x²

• y²

Answer explanation

Kedua suku tersebut memiliki faktor x, sehingga yang sama antara -2x^2y dan 5xy^2 adalah x.

Permudahkan (3x + 4y) - (2x - 5y)

• x + 9y

• x - y

• x + y

• x - 9y

Answer explanation

To simplify (3x + 4y) - (2x - 5y), distribute the negative sign inside the parentheses to get 3x + 4y - 2x + 5y. Combine like terms to get x + 9y, which is the correct answer choice.

Diberi p=2 dan q=3, cari nilai bagi 5p - 2q.

• 4

• 8

• -4

• -8

Answer explanation

To find the value of 5p - 2q, substitute p=2 and q=3. Therefore, 5(2) - 2(3) = 10 - 6 = 4. So, the correct answer is 4.