Question

Fill in the blanks:-
1. a? x 2a2 x 4a=
2. (5 - 2x)(3+ x)=
3. (b - 4)2=
4. Ratio of 5 m to 10 Km is
5. (x + a) (x + b)
solo​

Answer 1

Step-by-step explanation:

Hydroelectricity is generated by fast flow in water while thermal electricity is generated by using coal, petroleum and natural gas. ... Though the hydel power and the thermal electricity are pollution free but at the production sburce of thermal electricity, generate high pollution.