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3 years ago

Simplify: 5z^7⋅6z thanks

Mathematics

1 answer:

Deffense [45]3 years ago

4 0

Answer:

30z^8

Step-by-step explanation:

5z^7.6z

= 5 x z^7 x 6 x z

= 5 x 6 x z^7 x z

= 30 x z^(7+1)

=30z^8

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$9x^2-9(a+b)x+2a^2+5ab+2b^2=0\\\\9(x-\dfrac{a+b}{2})^2-9\dfrac{(a+b)^2}{4}+2a^2+5ab+2b^2=0\\\\9(x-\dfrac{a+b}{2})^2=\dfrac{9(a+b)^2-8a^2-20ab-8b^2}{4}\\\\9(x-\dfrac{a+b}{2})^2=\dfrac{9a^2+18ab+9b^2-8a^2-20ab-8b^2}{4}\\\\9(x-\dfrac{a+b}{2})^2=\dfrac{a^2+b^2-2ab}{4}=\dfrac{(a-b)^2}{4}\\\\(x-\dfrac{a+b}{2})^2=\dfrac{(a-b)^2}{2^2\cdot 3^2}$