Math, asked by valasakesavulu36, 6 hours ago

3x+7y³ by using formulae ​

Answers

Answered by SparklingThunder
1

Step-by-step explanation:

 {(3x + 7y)}^{3}  \\  {(a + b)}^{3}  =  {a}^{3}  +  {b}^{3}  + 3 {a}^{2}b + 3a {b}^{2}   \\  = ( {3x})^{3}  + ( {7y})^{3}  + 3 ({3x})^{2} (7y) + 3(3x) ({7y})^{2}  \\  = 27 {x}^{3}  + 343 {y}^{3}  + 189 {x}^{2} y + 441x {y}^{2}

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