Question

(2x + 5y)² - 40xy please answer this Request man... If you answer correctly You get huge number of points....​

Answer 1

Answer:

${(2x - 5y)}^{2}$

Step-by-step explanation:

${(2x + 5y)}^{2} - 40xy \\ = 4 {x}^{2} + 2 \times 2x \times 5y + 25 {y}^{2} - 40xy \\ = 4 {x}^{2} + 20xy + 25 {y}^{2} - 40xy \\ = 4 {x}^{2} - 20xy + 25 {y}^{2} \\ = {(2x)}^{2} - 2 \times 2x \times 5y + {(5y)}^{2} \\ = {(2x - 5y)}^{2}$

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