Question

m and the length of the rectangular park is 90 m, find the breadth of the rectangular park.
14 What should be taken away from 3x2 – 4y2 + 5xy + 20 to obtain – x2 - y2 + 6xy + 20?
19 Use the given algebraic expression to find 2nd, 5th and 10th term : 4m -2
18 Solve:
(a) (-1/8) = (16/7)
(b) (9/2) × (-7/4)
more​

Answer 1

Question 1) :- the area of a square park is the same as that a rectangular park if the side of the square park is 60 m and the length of the rectangular park is 90 m find the breadth of the rectangular park ?

Solution :-

we know that,

• Area of square = (side)²
• Area of rectangle = Length * Breadth .

so,

→ Area of rectangle = Area of square

→ L * B = (side)²

→ 90 * B = (60)²

→ 90 * B = 3600

→ B = 40 m . (Ans.)

Hence, the breadth of the rectangular park is 40 m.

Question 2) :- What should be taken away from 3x² – 4y² + 5xy + 20 to obtain :- x² - y² + 6xy + 20 ?

Solution :-

→ (3x² - 4y² + 5xy + 20) - (x² - y² + 6xy + 20)

→ 3x² - x² - 4y² + y² + 5xy - 6xy + 20 - 20

→ (2x² - 3y² - xy) (Ans.)

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