Question

5a²+2b²= 3
5a²-2b². 4

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Answer 1

Step-by-step explanation:

5a²+2b²=3 ------->eq.1

5a²-2b²=4 ------->eq.2

add eq.1 and eq.2

• 5a²+5a²+2b²-2b² = 3+4
• 10a² = 7
• a² = 7/10

substitute value of a² in either eq.1 or eq.2 to get value of b².

Answer 2

Answer:

Step-by-step explanation:

 5a²+2b²=3 ---equ 1

- 5a²-2b²=4 ---equ 2

subtract equ 1-2

4b²=-1

b²=-1÷4

b²=-0.25

b=√-0.25

b=0.5

substitute b=0.5 into equ 1

5a²+2(0.5)²=3

5a²+2(0.25)=3

5a²+0.5=3

5a²=3-0.5

5a²=2.5

a²=2.5/5

a²=0.5

a=√0.5

a=2.23

∴a2.23 ,b=0.5