Question

expand to simplify (a + b)² – (a - b)?​

Answer 1

Answer:

(a2-b2) is expanded form please mark me in brain list

Answer 2

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expand to simplify (a + b)² – (a - b)?

$\huge\bigstar\huge\tt\underline\red{ᴀɴsᴡᴇʀ }\bigstar$

${(a + b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

${(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

${(a + b)}^{2} - {(a - b)}^{2} = {a}^{2} + {b}^{2} + 2ab + {a}^{2} + {b}^{2} - 2ab$

$= 2 {a}^{2} + 2 {b}^{2} = 2( {a}^{2} + {b}^{2} )$

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