2 years ago

(4x+5) + (-3x²-3x) how to solve that

Mathematics

1 answer:

Over [174]2 years ago

4 0

Answer:

- 3x² + x + 5

Step-by-step explanation:

Given

(4x + 5) + (- 3x² - 3x) ← remove parenthesis

= 4x + 5 - 3x² - 3x ← collect like terms

= - 3x² + (4x - 3x) + 5

= - 3x² + x + 5

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Fynjy0 [20]

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$6.\\4(x-10)^2=25\qquad|:4\\\\(x-10)^2=\dfrac{25}{4}\to x-10=\pm\sqrt{\dfrac{25}{4}}\\\\x-10=-\dfrac{\sqrt{25}}{\sqrt4}\ \vee\ x-10=\dfrac{\sqrt{25}}{\sqrt4}\\\\x-10=-\dfrac{5}{2}\ \vee\ x-10=\dfrac{5}{2}\\\\x-10=-2.5\ \vee\ x-10=2.5\qquad|+10\\\\\boxed{x=7.5\ \vee\ x=12.5}$