Advertisements
Advertisements
Question
If * is an operation have, such that for integers a and b. We have a * b = a × b + (a × a + b × b), then find (–6) * 2
Solution
Now, put a = –6 and b = 2
(–6) * 2 = (–6 × 2) + [(–6) × (–6) + 2 × 2]
= –6 × 2 + (36 + 4)
= –12 + 40
= 28
APPEARS IN
RELATED QUESTIONS
Find the product, using suitable properties:
15 × (− 25) × (− 4) × (− 10)
A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C every hour. What will be the room temperature 10 hours after the process begins?
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (− 2) marks are awarded for every incorrect answer and 0 for questions not attempted.
Mohan gets four correct and six incorrect answers. What is his score?
Find the following product: (– 25) × 37 × 4
Find 16 × 12.
Find (– 23) × 48
Find 52 × (– 8) + (–52) × 2
In a true-false test containing 50 questions, a student is to be awarded 2 marks for every correct answer and –2 for every incorrect answer and 0 for not supplying any answer. If Yash secured 94 marks in a test, what are the possibilities of his marking correct or wrong answer?
A multistorey building has 25 floors above the ground level each of height 5 m. It also has 3 floors in the basement each of height 5 m. A lift in building moves at a rate of 1 m/s. If a man starts from 5 0m above the ground, how long will it take him to reach at 2nd floor of basement?
If Δ is an operation such that for integers a and b we have a Δ b = a × b – 2 × a × b + b × b (–a) × b + b × b then find (–7) Δ (–1). Also show that (–7) Δ (–1) ≠ (–1) Δ (–7).