Question

90x²-y²-10 factorize​

Answer 1

Answer:

(i) x²+y²

≡ (x+y)²-2xy

≡ (x+y+√(2xy))(x+y-√(2xy))

(ii) x²+y²

≡ x²-(iy)²

≡ (x+iy)(x-iy)

(iii) x²+y²

≡y²+x²

≡y²-(ix)²

≡(y+ix)(y-ix)

(iv) x²+y²

≡ (x-y)²+2xy

≡(x-y)²-(i√2xy)²

≡ {x-y+i√(2xy)}{x-y-i√(2xy)}

Mark me as a brainlist

Answer 2

Answer:

How do I factorise x²+y²?

Choose the right partner in your home building journey.

Factorising into (i) real, (ii) complex factors .

(i) x²+y²

≡ (x+y)²-2xy

≡ (x+y+√(2xy))(x+y-√(2xy))

(ii) x²+y²

≡ x²-(iy)²

≡ (x+iy)(x-iy)

(iii) x²+y²

≡y²+x²

≡y²-(ix)²

≡(y+ix)(y-ix)

(iv) x²+y²

≡ (x-y)²+2xy

≡(x-y)²-(i√2xy)²

≡ {x-y+i√(2xy)}{x-y-i√(2xy)}