Question

8. Use the identify (x+a) (x+b)= x

2+(a+b)x + ab. To evaluate of : 155 x 158

9.​

Answer 1

Answer:

564635

Step-by-step explanation:

Answer 2

Answer:

24490

Step-by-step explanation:

(160-5)(160-2)

160²+[{(-5)+(-2)}×160]+[(-5)(-2)]

25600+[(-7)×160]+10

25600+(-1120)+10

25600-1120+10

=24490