answer only 1 part with formula
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Answer:
given : - (x+8)(x-10)
Formula :- a^2-b^2
x^2 - 10^2
x - 100
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Answered by
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★ ( x + a ) ( x + b )= x ² + x( a + b ) + ab
( x + 4)( x + 10 ) = x ² + x(4+10) +40
x ² + 4x +10x +40
x ² + 14 x + 40
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