x is defined as 40% of 40.
If y=x2+5x+8 , find the value of y.
350
324
344
374
40% of 40 = 40100×100 = 16
x2 = 16×16 = 256
5x = 16 × 5 = 80
∴ y = 256 + 80 + 8 = 344
x is defined as 30% of 30. If y=x2+4x+7, find the value of y.
x is defined as 50% of 30. Then find the value of x2+5x−220