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Sagot :
Answer:
- a) 66, b) - 1, c) - 20
Step-by-step explanation:
Solve as below
a) a² + ab with a = 6.6, b = 3.4;
- a² + ab = a(a + b) = 6.6(6.6 + 3.4) = 6.6(10) = 66
b) x² - xu at x = 0.5, y = 2.5;
- x² - xu = x(x - u) = 0.5(0.5 - 2.5) = 0.5(- 2) = - 1
c) -5a² - 5ah at a = 4, h = -3;
- -5a² - 5ah = - 5a(a + h) = - 5(4)(4 - 3) = - 20(1) = - 20
Answer:
- a) 66
- b) -1
- c) -20
Step-by-step explanation:
a) a² + ab = ?
→ (6.6)² + (6.6 × 3.4)
→ 43.56 + 22.44
→ 66
So, the answer is 66.
b) x² - xu = ?
→ (0.5)² - (0.5 × 2.5)
→ 0.25 - 1.25
→ -1
So, the answer is -1.
c) -5a² - 5ah = ?
→ -5(4)² - 5(4 × -3)
→ (-5 × 16) - (5 × -12)
→ -80 + 60
→ -20
So, the answer is -20.
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