The value of la-1)+q? --- 2 4210 )
when a = 2 and b= -1 is

-1

Step-by-step explanation:

2−1+  (22−(−1)²) / (1−(2)(−1))

+2(2−(−1)) / (2)(−1)

22−(−1)2 / 1−(2)(−1)

+2(2−(−1)) / (2)(−1)

= -1

2.5

Step-by-step explanation:

Calculate the scale factor as the ratio of corresponding sides of the image to the original.

here image is 5 and original is 2

scale factor = = 2.5

scale factor of 0.4 is False

scale factor of 2.5 is True