Respuesta :

fieryanswererft

Set A

2) Formula needed to solve:

Difference of two square formula: (a+b)(a-b) = a² - b²

3) Find Products:

a)                             [solve them using the diff of two square formula]

  • (x+7)(x-7)
  • x² -7²
  • x² -49

b)

  • (x-9)(x+9)
  • x² -9²
  • x² -81

c)

  • (4x-3)(4x+3)
  • (4x)² -3²
  • 16x² -9

4)

Another example: (x+10)(x-10)

  • (x+10)(x-10)
  • (x)² -(10)²
  • x² - 100

5)

Type of math, not in this set: (2x +3)(2x+6)

We Have to solve it Using Foil Method: (a+b)(c+d) = ac + ad + bc + bd

  • (2x +3)(2x+6)
  • (2x)(2x) +6(2x) +3(2x) +3(6)
  • 4x² +6x +12x +18
  • 4x² +18x +18

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