Question

-1(5-6-7-8-9-5+6+7+8+9)
-4(3+3-5-6-7+1)-2-2​

Answer 1

-1(5-6-7-8-9-5+6+7+8+9)

=−1(−1−7−8−9−5+6+7+8+9)

=−1(−8−8−9−5+6+7+8+9)

=−1(−16−9−5+6+7+8+9)

=−1(−25−5+6+7+8+9)

=−1(−30+6+7+8+9)

=−1(−24+7+8+9)

=−1(−17+8+9)

=−1(−9+9)

=(−1)(0)

=0

-4(3+3-5-6-7+1)-2-2

=−4(6−5−6−7+1)−2−2

=−4(1−6−7+1)−2−2

=−4(−5−7+1)−2−2

=−4(−12+1)−2−2

=(−4)(−11)−2−2

=44−2−2

=42−2

=40