Add 2x2 – 3x + 1 to the sum of 3x2 – 2x and 3x + 7.

1.	Add 2x2 – 3x + 1 to the sum of 3x2 – 2x and 3x + 7.
Answer» Given 2x² – 3x + 1, 3x² – 2x and 3x + 7 sum of 3x² – 2x and 3x + 7 = (3x² – 2x) + (3x +7) =3x² – 2x + 3x + 7 = (3x² + x + 7) Now, required expression = 2x²– 3x + 1+ (3x²+ x + 7) = 2x²+ 3x² – 3x + x + 1 + 7 = 5x²– 2x + 8

Answer»

Given 2x² – 3x + 1, 3x² – 2x and 3x + 7

sum of 3x² – 2x and 3x + 7

= (3x² – 2x) + (3x +7)

=3x² – 2x + 3x + 7

= (3x² + x + 7)

Now, required expression = 2x²– 3x + 1+ (3x²+ x + 7)

= 2x²+ 3x² – 3x + x + 1 + 7

= 5x²– 2x + 8

Discussion