Notes of Class 5th To 12th, English Grammar & Social Science & Science X&Y Formulas - Study Material
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(x+y) =x* +2xy + y², (x-y) =x-2xy+ y, • (x+y)(x=y)=x² - y, • (x+a)(x+b)=x²+(a+b)x+ab, (x+y+z)* = x² + y°+z² + 2xy + 2yz +2zr, (x+y)' =x' +y° +3xy(x+ y)=x²+y° +3x²y+3xy°, • (x-y)' =x' - y' –3xy(x-y) =x' - y' -3x°y+3xy², x' +y' =(x+y)(x² -xy +y³), x-y' =(x-y)(x° +xy+y²)
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