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aleksandrvk [35]
3 years ago
15

Find the errors and correct the following mathematical sentences.​

Mathematics
1 answer:
schepotkina [342]3 years ago
5 0

Answer:

ix) (2a + 3)² = <u>4</u>a² +<u>12</u>a + 9

x) a) x² + 7x + 12 = (-3)² + 7(-3) + 12 = 9 <u>-21</u> + 12 = <u>0</u>

b) x² - 5x + 6 = (-3)² - 5(-3) + 6 = 9 <u>+ 15</u> + 6  = <u>30</u>

c) x² + 5x = (-3)² + 5(-3) = 9 -15 =  <u>-6</u>

<u></u>

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