Mathematics, 15.10.2020 09:01 cfonse11
Jeff learned that the product of the polynomials (a + b)(a2 – ab + b2) was a special pattern that would result in a sum of cubes, a3 + b3. His teacher put four products on the board and asked the class to identify which product would result in a sum of cubes if a = 2x and b = y.
Which product should Jeff choose?
a
(2x + y)(4x2 + 2xy – y2)
b
(2x + y)(4x2 – 2xy + y2)
c
(2x + y)(2x2 + 2xy – y2)
d
(2x + y)(2x2 – 2xy + y2)
Answers: 3
Mathematics, 21.06.2019 20:30, extasisjorge
Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error
Answers: 1
Mathematics, 21.06.2019 23:30, legendman27
Given: ad¯¯¯¯¯ is an altitude. prove: ab2+ac2=cb2 right triangle a b c with right angle a. point d lies on side b c and segment a d is drawn. angle a d c is a right angle. drag and drop a reason into each box to correctly complete the two-column proof. statement reason ad¯¯¯¯¯ is an altitude, and ∠bac is a right angle. given ∠adb and ∠adc are right angles. definition of altitude ∠bac≅∠bda ? ∠bac≅∠adc ? ∠b≅∠b ? ∠c≅∠c reflexive property of congruence △abc∼△dba ? △abc∼△dac aa similarity postulate abbd=cbab ? ab2=(cb)(bd) cross multiply and simplify. acdc=cbac polygon similarity postulate ac2=(cb)(dc) cross multiply and simplify. ab2+ac2=ab2+(cb)(dc) addition property of equality ab2+ac2=(cb)(bd)+(cb)(dc) substitution property of equality ab2+ac2=(cb)(bd+dc) ? bd+dc=cb segment addition postulate ab2+ac2=cb2 substitution property of equality
Answers: 1
Jeff learned that the product of the polynomials (a + b)(a2 – ab + b2) was a special pattern that wo...
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