Question

Please do q 4 and don't spam please... I urgently need answer it is marked with a star

Answer 1

Answer:

Step-by-step explanation:

Hey there!

Let the breadth be = x  

Length = 40 - x

Area = 400 m^2

l × b = 400

(x)(40 - x) = 400

x^2 - 40x + 400 = 0

By using Identity,  

(a-b)^2 = a^2 - 2ab + b^2

(x-20)^2 .

Answer 2

Let the ages be x and y

x+y=20---------------(1)

4 years ago......

(x-4)(y-4)=48

xy-4x-4y-16=48

xy-4(x+y)=48+16

xy-4(20)=64

xy=144

x=144/y

substitute in (1)

x+y=20

144/y+y=20

144+y²=20y

y²-20y+144=0

which is impossible to be solved

so, it is impossible

pls mark as brainliest