Question

lengh and breadth of a rectangle are (y²-6) and (y²+7) units them its area will be​

Answer 1

Solve

(Side)2 = Area

⇒ (x + 2)2 = 64

⇒ (x + 2)2 = 82

⇒ x + 2 = 8

⇒ x = 8 – 2

∴ x = 6

∴ Side = x + 2 = 6 + 2 = 8 cm

Answer 2

Answer:

area = lb

= (y²-6)(y²+7)

= y⁴-6y² +7y² -42

= y⁴ +y² -42