Question

50 POINTS!!

LIST ALL THE IDENTITIES OF CLASS 9 POLYNOMIALS CHAPTER
I WILL MARK BRAINLIEST
NO USELESS ANSWERS OR REPORT

Answer 1

IDENTITIES

${(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab \\ {(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab \\ {a}^{2} - {b}^{2} = (a + b)(a - b) \\ {(a + b)}^{3} = {a}^{3} + {b}^{3} + 3ab(a + b) \\ {(a - b) }^{3} = {a}^{3} - {b}^{3} - 3ab(a - b)$

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Answer 2

Answer

${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy \\ {(x - y)}^{2} = {x}^{2} + {y}^{2} - 2xy \\ {x}^{2} - {y}^{2} = (x + y)(x - y) \\ {(x + y)}^{3} = {x}^{3} + {y}^{3} + 3xy(x + y) \\ {(x - y)}^{3} = {x}^{3} - {y}^{3} - 3xy(x - y) \\ {x}^{3} - {y}^{3} = (x - y)( {x}^{2} + {y}^{2} + xy) \\ {x}^{3} + {y}^{3} = (x + y)( {x}^{2} + {y}^{2} - xy)$