Question

if a+b = 4 and a-b = 2, then the value of a²- b²
*12
*5
*8
*4​

Answer 1

Answer:

${a}^{2} - {b}^{2} \\ = (a + b)(a - b) \\ = 4 \times 2 \\ = 8$

Answer 2

Answer:

$(a + b)(a - b) = ( {a}^{2} - {b}^{2}) \\ now \: \: ( a + b) = 4 \: and \: (a - b) = 2 \\ {a}^{2} - {b}^{2} = 4 \times 2 = 8$

★AnSweR★:→. *8

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