Question

Evaluate the expression for the given variable values. 2a² - 8ab - √b if a=-7 and b=4

325
320
327
321

Answer 1

320

Explanation:

When a = -7 and b = 4,

2a² - 8ab - √b

= 2(-7)² - 8(-7)(4) - √4

= 2(49) - 8(-28) - 2

= 98 + 224 - 2

= 320