Question

The cost of a pen is Rs (x + 5) and Varun bought (x + 5) pen.

a) Find the total amount paid by him in terms of x.
i. Rs x^2 + 5x + 6
ii. Rs x^2 + 10x + 25
iii. Rs x^2 − 10x + 25
iv. None of above

b) If x = 10, find the amount paid by him.
i. Rs 200
ii. Rs 215
iii. Rs 225
iv. Rs 230

(1)

c) If x = -1, find the amount paid by him.
i. Rs 13
ii. Rs 14
iii. Rs 15
iv. Rs 16

d) If x^2 = 25, find total number of pen?
i. 5
ii. 10
iii. 20
iv. 15

Answer 1

$\huge {\red {\boxed {\boxed {\orange{\underline {\overline \green{《Answer》}}}}}}}$

a) Total Amount = (x +5) ×(x+5) = x (x+5) + 5 (x+5)

= x ^2 +5x +5x +25

= x^2 +10x +25

b) If x =10...

(10 +5) ×(10+5)

15 ×15

=225

c)If x = -1....

(-1 +5) ×(-1 +5)

4×4

=16

d) x ^2 =25

x ^2 =5^2

x =5

$\pink{hope \: it \: helps❤}$

Answer 2

a) Total Amount = (x +5) ×(x+5) = x (x+5) + 5 (x+5)

= x ^2 +5x +5x +25

= x^2 +10x +25

b) x =10

(10 +5) ×(10+5)

15 ×15

=225

c)x = -1

(-1 +5) ×(-1 +5)

4×4

=16

d) x ^2 =25

x ^2 =5^2

x =5