Multiply:
(0.8a − 0.5b) by (1.5a − 3b)

Open in App

Solution

To multiply, we will use distributive law as follows:

$(0.8 a - 0.5 b) (1.5 a - 3 b) = 0.8 a (1.5 a - 3 b) - 0.5 b (1.5 a - 3 b) = 1.2 a^{2} - 2.4 a b - 0.75 a b + 1.5 b^{2} = 1.2 a^{2} - 3.15 a b + 1.5 b^{2}$

Thus, the answer is $1.2 a^{2} - 3.15 a b + 1.5 b^{2}$ .

Suggest Corrections

Similar questions

$(0.8 a - 0.5 b) b y (1.5 a - 3 b)$

Q. Multiply:

8 a b^{2}

- 4 a^{3} b^{4}

Q. Multiply the polynomials:

(i) (2.5 a - 0.5 b) a n d (4 b^{2} - 8 a b)

(i i) (\frac{1}{9}) a^{2} + b c - 15 a n d (\frac{4}{7}) b^{2} + a b + 10

Multiply the polynomials:

$(i) (2.5 a - 0.5 b) a n d (4 b^{2} - 8 a b)$

$(i i) (\frac{1}{9}) a^{2} + b c - 15 a n d (\frac{4}{7}) b^{2} + a b + 10$ [2 MARKS]

Q. Multiply : (i)

3 x^{2}

+ 4xy by 2x (ii) – 4a [a + 3b]

Join BYJU'S Learning Program

Multiply: (0.8a − 0.5b) by (1.5a − 3b)

To multiply, we will use distributive law as follows: 0.8a-0.5b1.5a-3b=0.8a1.5a-3b-0.5b1.5a-3b=1.2a2-2.4ab-0.75ab+1.5b2=1.2a2-3.15ab+1.5b2 Thus, the answer is 1.2a2-3.15ab+1.5b2.

Multiply:
(0.8a − 0.5b) by (1.5a − 3b)

To multiply, we will use distributive law as follows:

$(0.8 a - 0.5 b) (1.5 a - 3 b) = 0.8 a (1.5 a - 3 b) - 0.5 b (1.5 a - 3 b) = 1.2 a^{2} - 2.4 a b - 0.75 a b + 1.5 b^{2} = 1.2 a^{2} - 3.15 a b + 1.5 b^{2}$

Thus, the answer is $1.2 a^{2} - 3.15 a b + 1.5 b^{2}$ .