Final answer:
To simplify the expression, combine like terms by adding the coefficients and exponents.
Step-by-step explanation:
To simplify the expression (-11x^2 + 1.4x -3) + (4x^2 - 2.7x + 8), we add the corresponding terms together. The simplified expression is:
(-11x^2 + 1.4x - 3) + (4x^2 - 2.7x + 8) = -11x^2 + 4x^2 + 1.4x - 2.7x - 3 + 8
Combining like terms:
-11x^2 + 4x^2 + 1.4x - 2.7x - 3 + 8 = (-11 + 4)x^2 + (1.4 - 2.7)x + (-3 + 8)
Simplifying further:
(-11 + 4)x^2 + (1.4 - 2.7)x + (-3 + 8) = -7x^2 - 1.3x + 5