Here, we know, √225 = 25 (perfect squared)
whereas √223 is not a perfect squared.
So, √225 would be "Rational" whereas √223 would be "Irrational" by the nature.
Hope this helps!
Answer:
21. x = 5, 23.
Step-by-step explanation:
The answer would end up being 0.01323
1. (4x+5y)(2x-3y)+3xy= 4x*2x-4x*3y+5y*2x-5y*3y+3xy=8x^2-12xy+10xy-15y^2+3xy= 8x^2+xy-15y^2
2. (2x^2+3)(4x+5)-8x(x^2-2)=2x^2*4x+2x^2*5+3*4x+3*5-8x*x^2+8x*2=
=8x^3+10x^2+12x+15-8x^3+16x=
=10x^2+28x+15
