Question

3. Fill in the blanks.

a. The value of 5x25 – 3x12 + 2 at x = –1 is__________.

b. If a = –2, b= 2 then the value of (b2 – a) will be_________.

c. Area of square with side –2pq cm is _______cm2 .

d. The factors of y2 + 6y + 9 are_________.

e. The greatest common factor of 6xy and 15x2 y 2 is_________.​

Answer 1

Step-by-step explanation:

1. Simplify: 5n(2n3+n2+8)+n(4-n).

Solution:

5n(2n3+n2+8)+n(4-n).

= 5n × 2n3 + 5n × n2 + 5n × 8 + n × 4 - n × n.

= 10n4 + 5n3 + 40n + 4n – n2.

= 10n4 + 5n3 + 44n – n2.

= 10n4 + 5n3 – n2 + 44n.

Answer: 10n4 + 5n3 – n2 + 44n

2.Answer: -2y3 – 17y2 + 24y – 6

3

Answer 2

Answer:

b.

Step-by-step explanation:

if a= -2 , b= 2 then

(b2-a)

2×2-(-2)

4+2

6