1.

Find the square of 4x-5 by using identity. Write the identity used also.​

Answer»

ANSWER:

(4x-5)^2=16x^2-40x+25

Step-by-step EXPLANATION:

{(4x - 5)}^{2} \\ {(a - b)}^{2} = {a}^{2} - 2ab + {b}^{2} \\ {(4x - 5)}^{2} = {(4x)}^{2} - 2(4x)(5) + {5}^{2} \\ = ( {4})^{2} ( {x})^{2} - 10(4x) + 25 \\ = 16 {x}^{2} - 40x + 25 \\ therefore \: ({4x - 5})^{2} = 16 {x}^{2} - 40x + 25


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