Question

PLEASE SOLVE ONLY 3rd & 4th QUESTION​

Answer 1

Answer:

C. (x+1)(x+2)

D. (5a+b+4c)(25a^2 +b^2+16c^2-5ab-4bc-20ac)

Step-by-step explanation:

C. √2x^2 + 3x + √2

= x^2 +3x + 2

= x^2 + 2x +x +2

= x(x+2)+1(x+2)

=(x+1)(x+2) Ans.

D. 125a^3 + b^3 + 64c^3 -60abc

= (5a)^3 + b^3 +(4c)^3 -3×5a×b×4c

= (5a+b+4c){(5a)^2 +b^2 + (4c)^2 - 5a×b -b×4c- 4c×5a}

= (5a+b+4c)(25a^2 - b^2 - 16c^2 -5ab -4bc- 20ac) Ans.