1.

If the difference of two numbers is 2 and the product is 80, what are the 2 numbers?

Answer»

\blue{\bold{\underline{\underline{Answer:}}}}

\green{\tt{\therefore{Numbers\:are=(10,8)\:or\:(-8,-10)}}}

\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}

\green{\underline \bold{<klux>GIVEN</klux>:}} \\  \tt:\implies Difference \: of \: two \: number = 2 \\  \\ \tt:\implies Product \: of \: two \: number = 80 \\  \\ \red{\underline \bold{To \: Find:}} \\  \tt:  \implies numbers = ?

ACCORDING to given QUESTION :

\circ \:  \text{Let \: first \: no. \: be \: x} \\  \\ \circ  \:  \:  \:  \:  \:  \:  \:  \:  \text{second \: no. \: be \: y}  \\  \\  \tt: \implies x - y = 2 -  -  -  -  - (1) \\  \\  \tt: \implies xy = 80 \\  \\  \tt: \implies x =  \frac{80}{y}  -  -  -  -  - (2) \\  \\  \text{putting \: value \: of \: x \: in \: (1)} \\  \tt: \implies  \frac{80}{y}  - y = 2 \\  \\ \tt: \implies  \frac{80 -  {y}^{2} }{y}  = 2 \\  \\ \tt: \implies 80 -  {y}^{2}  = 2y \\  \\ \tt: \implies  {y}^{2}  + 2y - 80 = 0 \\  \\ \tt: \implies  {y}^{2}  + 10y - 8y - 80 = 0 \\  \\ \tt: \implies y(y  + 10) - 8(y + 10) = 0 \\  \\ \tt: \implies (y - 8)(y + 10) = 0 \\  \\  \green{\tt: \implies y = 8 \: and \:  - 10}\\  \\  \text{Putting \: value \: of \: y = 8 \: in \: (1)} \\  \tt: \implies x - 8 = 2 \\  \\   \green{\tt: \implies x = 10} \\  \\  \text{Putting \: value \: of \: y =  - 10} \\ \tt: \implies x - ( - 10) = 2 \\  \\ \tt: \implies x + 10 = 2 \\  \\  \green{\tt: \implies x =  - 8} \\  \\   \green{\tt \therefore Numbers \: are \: (10, 8) \: or \: ( - 8,- 10)}



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