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Assignments
30.115 Quiz Friday, May 7
D = +1
D= -1
algebra tiles
1. 2x+2+(-3)=5x+8: Combine like terms on the
left:
Write the Equation is after you combined
like terms:
ll

m∠a is 90°

m∠b is 40°

the difference of two squares is a special form that has a factorization worth memorizing.

a² - b² = (a - b)(a + b)

your equation can be factored as

x² - 16 = 0

(x - 4)(x + 4) = 0

the zero product rule tells you the solutions are the values of x that make these factors zero: x=4, x=-4.