For all n, (3n+5)2 = ?
Correct answer: D. 9n2+30n+25
- A. 6n2+15n+ 10
- B. 6n2+30n+25
- C. 9n2+6n+ 10
- D. 9n2+30n+25
Explanation
Expand the expression using (a+b)² =a2+2ab+b²: (3n)²+2x3n×5+52 Simplify using exponent rule with same exponent (ab)" =ar.b": 32 xn²+2x3n×5+ 52 Calculate the power: 9n²+2x3n×5+25 Multiply the monomials: 9n2+30n+25 get the result: True
Last updated
Related questions
(1/2x+1) + 5Which of the following is equivalent to the expression above for x > 0?
1/400 in percentage =
100 oranges are bought at the rate of Rs. 350 and sold at the rate of Rs. 48 per dozen. The percentage of profit or loss is:
100 oranges are bought at the rate of Rs. 350 and sold at the rate of Rs. 48 per dozen. The percentage of profit or loss is:
|14| * |-2|=?