1.

`{:( "Column" A ,, "Column" B) , ("If" a^(2) - b^(2) = 16 "and" a- b = 2 "," "then" a + b,, "(a)" 3x^(2) - x - 11), ("The degree of " (x-a) (x-b) (x - c) (x-d) ,, "(b)" 3x^(2) - x + 5), (4x^(2) + 20xy + 25y^(2) ,, (c) 8), ((5x^(2) + 7x -3)- (2x^(2) + 8x -8) ,, (d) 4), (,, (e) (4x + 5y) (x+ 5y)), (,,(f) (2x + 5y)^(2)):}`

Answer» Correct Answer - c, d, f, b
`to (c) : a + b = (a^(2) - b^(2))/(a-b) = (16)/(2) = 8`
`to (d)` : The degree of (x -a) (x -b) (x-c) (x -d) is 4 .
`to ` (f) : `4x^(2) + 20xy + 25y^(2)`
= `(2x)^(2) + 2(2x) (5y) + (5y)^(2)`
= `(2x + 5y)^(2)`
`to` (b) : `(5x^(2) + 7x - 3) - (2x^(2) + 8x - 8)`
= `5x^(2) - 2x^(2) + 7x - 8x - 3 + 8`
=`3x^(2) - x + 5`


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