Ifa2-b2=15anda-b=3,thenwhatisthevalueofa+b? A: -45 B: 0 C: 12 D: 18 E: 5

2022-06-06

Ifa²-b²=15anda-b=3,thenwhatisthevalueofa+b?
A: -45
B: 0
C: 12
D: 18
E: 5

答案：

E

0
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If<em>a</em><sup>2</sup>-<em>b</em><sup>2</sup>=15<em>a</em>nd<em>a</em>-<em>b</em>=3,thenwh<em>a</em>tisthev<em>a</em>lueof<em>a</em>+<em>b</em>? A: -45 B: 0 C: 12 D: 18 E: 5