Помогите!

1) 5^ (x+1) - 126*5^0.5x + 25=0

2) 729 * 7^x + 9^x - 63^x - 729=0

1

5*5^x-126*5^0,5x+25=0

5^0,5x=a

5a²-126a+25=0

D=15876-500=15376

√D=124

a1 = (126-124) / 10=1/5⇒5^0,5x=1/5⇒0,5x=-1⇒x=-2

a2 = (126+124) / 10=25⇒5^0,5x=25⇒0,5x=2⇒x=4

2

729 * (7^x-1) - 9^x * (-1+7^x) = 0

(7^x-1) * (729-9^x) = 0

7^x-1=0

7^x=1

x=0

729-9^x=0

9^x=729

x=3