Question

pls answer this and i will mark u as brainliest​

Answer 1

Answer:

(1) 125x^3+27y^3+8z^3-90xyz

= (5x)^3 + (3y)^3 + (2z)^3 - 3 × (5x) × (3y) × (2z)

= (5x + 3y + 2z) {(5x)^2 + (3y)^2 + (2z)^2 - (5x)(3y) - (3y)(2z) - (2z)(5x)}

= (5x + 3y + 2z) ( 25x^2 + 9y^2 + 4z^2 - 15xy - 6yz - 10zx)

(2) (x-y)²-7(x²-y²)+12(x+y)²

=x²+y²-2xy-7x²+7y²+12(x²+y²+2xy)

=-6x²+8y²-2xy+12x²+12y²+24xy

=6x²+20y²+20xy

(3)  16a^2-4b^2-9c^2

plz mark it brainlist

Answer 2

Step-by-step explanation:

answer please write 7th no.question clearly