Question

Plz answer the question.
Bcuzz tomorrow I have to complete my homework.

Answer 1

squaring is done

${3y}^{2} - { \sqrt{16} {y}^{2} = {3y}^{2} - {16} {y}^{2} \\ = - {13y}^{2}$

Answer 2

answer is -y

EXPLANATION

3y-4y=-1y or -y

(sq.root of 16 is 4 ,if we multiple 4×4 = 16 so we take one four from the sq.root and we should cancel the sq.root)

explanation for -y is

(there is 3y -4y , the biggest no. before the symbol is MINUS so the is in negative