Question

(5x4+3x2-5x)+(3x3-8x2+9x-3)=

Answer 1

( 5×4 + 3×2 - 5×) + ( 3×3 - 8×2 + 9×-3) =
( 20 + 6 - 5×) + ( 9 - 16 + -27) =
( 26 - 5×) + ( 9 - 43 ) =
( 21×) + ( -34) =
21 × -34 =
= -714

Espero ter ajudado!!!♡☆