3 years ago

How could you use the Distributive Property to rewrite the expression −(8 + 12)?

Mathematics

2 answers:

guajiro [1.7K]3 years ago

8 0

Answer:

-20

Step-by-step explanation:

-8-12=-20

bogdanovich [222]3 years ago

6 0

The answer is this number -20

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The sum of 28+29+42=99. So what addition property was used Commutative, associative, identity, or distributive ?

IrinaVladis [17]

28 + 29 + 42 = 28 + 42 + 29 = 99

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2 years ago

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Write the given trinomial if possible as a square of a binomial or as an expression opposite to a square of a binomial: 15ab-9a^

MrMuchimi

Answer:

$- \bigg(3a - \frac{5}{2} b) \bigg)^{2}$

Step-by-step explanation:

$15ab-9a^2-6 \frac{1}{4} b^2 \\ \\ = 15ab-(3a)^2-\frac{6 \times 4 + 1}{4} b^2 \\ \\ = 15ab-(3a)^2-\frac{24+ 1}{4} b^2 \\ \\ = 15ab-(3a)^2-\frac{25}{4} b^2 \\ \\ = 15ab- (3a)^2- \bigg(\frac{5}{2} b \bigg)^2 \\ \\ = - \{ - 15ab + (3a)^2 + \bigg(\frac{5}{2} b \bigg)^2 \} \\ \\ = - \{ (3a)^2 + \bigg(\frac{5}{2} b \bigg)^2 - 15ab \} \\ \\ = - \bigg(3a - \frac{5}{2} b \bigg)^{2}$