1.

Find the sum of 5x^2,-3x^2,7x^2 and -2x^2​

Answer»

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ATQ,

=  {5x}^{2}  + ( -  {3x}^{2} ) +  {7x}^{2}  + ( { - 2x}^{2} )  \\  =  {5x}^{2} -  {3x}^{2}   +  {7x}^{2}  -  {2x}^{2}  \\  =  {2x}^{2}  + {5x}^{2}  \\  =  {7x}^{2}

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