All categories

2 years ago

The product of (a − b)(a − b) is a2 − b2. A. Sometimes B. Always C. Never

Mathematics

1 answer:

Damm [24]2 years ago

8 0

$(a-b)(a-b)=a^2-2ab+b^2\\\\a^2-2ab+b^2=a^2-b^2\\2b^2=2ab\\b^2=ab\implies a=b \vee b=0$

So, sometimes.

You might be interested in

A manufacturer of lawnmowers wanted to know the most important product attributes to consumers. The company's research team deve

stepladder [879]

Answer: Ordinal measurement scale

Step-by-step explanation:

In ordinal measurement scale the order of values or variables are very important. Just as in the case above, the rating from 1-3 is according to the order of it's importance.

Thanks

7 0

2 years ago

What expression is equivalent to (9x^2 + 2x -7)(x - 4)

Dima020 [189]

Answer: C

Step-by-step explanation:

We can use the expanding rule to get that one if the expressions is

(9x^2 + 2x - 7)x + (9x^2 + 2x - 7)(-4)

3 0

1 year ago

A phone costs $50 and goes on sale for 20% off. Select the amount that was discounted as well as the final price after the sale

dexar [7]

Answer:

Discounted amount = $10

Sales price = $40

Step-by-step explanation:

Given:

Phone cost = $50

Discount rate = 20%

Find:

Discounted amount and sales price

Computation:

Discounted amount = Phone cost x Discount rate

Discounted amount = 50 x 20%

Discounted amount = $10

Sales price = Phone cost - Discounted amount

Sales price = $50 - $10

Sales price = $40

5 0

2 years ago

The profit earned by selling a quantity of x + 2 of a product is given by the expression x^4 − x^3 − 24. What is the average pro

Gekata [30.6K]

Te average = Amount/total quantity:

Proceed the division of x^4 − x^3 − 24 by x+2

The result is = x³-3x²+6x-12

4 0

3 years ago

Ben runs around the track at a pace of 1 lap every 80 seconds. Sally runs on the track in the opposite direction. The two meet e

disa [49]

48 seconds, Consider what happens between one time that Ben and Sally meet and the next. During this period Ben runs 30 (seconds)/80 (seconds/lap) = 3/8 of a lap. So Sally runs 5/8 lap in the same time. Her speed is therefore 5/8 (laps)/ 30(seconds) which amounts to 1 (lap)/ 48 (seconds).

5 0

3 years ago