Question

1)When one side of a square is decreased by 7cm, the area becomes 625 sq.cm.
a). Take the side of first square as x, form the equation
b). Find the side of the original square​

Answer 1

Given→

If side is decreased by 7 cm , then the area = 625 cm².

To find→

a) equation

b) original side

Solution→

a). Equation = ?

Area of the square = side²

Side of the original square = x

Area of the original square = x²

According to question,

( x - 7 )² = 625

x²-2(x)(7) + 7² = 625

x²-14x+ 49-625 = 0

x²-14x-576 = 0

b) side of the original square = ?

x² - 32x + 18x -576 = 0

x(x-32) + 18 (x- 32) = 0

(x+ 18 )(x- 32) = 0

x= -18 or x = 32

rejecting x = -18 as side can't be negative

x = 32

Therefore, side of the original square is 32 cm.

Hope it's helpful :-)

Answer 2

Answer:

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product