Question

pls do all it's urgent
explain also pls​

Answer 1

Step-by-step explanation:

1) 5 ^8x=(625)^2

5^8x=(5^4)^2

5^8x=(5)^4×2

5^8x=5^8

8x=8

x=1

2)[(1/3)^x+3] [(1/3)^x+5]=(1/3)^18

(1/3)^x+3+x+5=(1/3)^18

(1/3)^2x+8=(1/3)^18

2x+8=18

2x=18-8

2x=10

x=5

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Answer 2

Answer:

1. x=1 ; 2.x=5

Step-by-step explanation:

1》5^8x=625^2

REMEMBER THE SIGN (^) MEANS "TO THE POWER "

OKAY CONTINUING

》5^8x=(5^4)^2

》5^8x=5^4×2=5^8 (using the law:

${n}^{m}^{a} = {n}^{m \times \: a}$

further:

8x=8

x=8÷8=1

2》( 1/3)^(x+3) × (1/3)^(x+5) =(1/3)^18

》 (1/3)^{(x+3) + (x+5)} =(1/3)^18 [ used the law: a^n ×a^m=a^m+n]

》(1/3)^(2x+8)=(1/3)^18

so,》2x+8=18

》2x=18-8=10

》x=10/2=5