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2 years ago

Factor: 2a^2-ab-6b^2

Mathematics

1 answer:

pogonyaev2 years ago

5 0

Rewrite the expression as

$2a^2-4ab+3ab-6b^2$

Factor 2a from the first two terms and 3b from the last two:

$2a(a-2b)+3b(a-2b)$

Factor a-2b

$(a-2b)(2a+3b)$

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2 years ago

Evaluate the expression for b = 7<br> 6b + 8 – 5b

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0.5x+7/3 = 21/4 cross multiply

TiliK225 [7]

Solving the expression $\frac{0.5x+7}{3}=\frac{21}{4}$ we get: $x=\frac{35}{2}\,\,or\,\,x=17.5$

Step-by-step explanation:

Solving the expression: $\frac{0.5x+7}{3}=\frac{21}{4}$

Solving by cross multiplying:

$\frac{0.5x+7}{3}=\frac{21}{4}\\(0.5x+7)*4=21*3\\Simplifying:\\2x+28=63\\Adding\,\,-28\,\,on\,\,both\,\,sides:\\2x+28-28=63-28\\2x=35\\Divide\,\,both\,\,sides\,\,by\,\,2\\\frac{2x}{2}=\frac{35}{2}\\x=\frac{35}{2}\,\,or\,\,x=17.5$

So, solving the expression $\frac{0.5x+7}{3}=\frac{21}{4}$ we get: $x=\frac{35}{2}\,\,or\,\,x=17.5$

Keywords: Solving Fractions

Learn more about Solving fractions at:

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