Question

Ajutor
Dau coroana!!!!!!​

Answer 1

$\green{ \boxed{ {a}^{2} - {b}^{2} = (a - b) (a + b)}}$

a)x²-1=x²-1²=(x-1)(x+1)

b) x²-4=x²-2² = (x-2)(x+3)

c) x²-9=x²-3²= (x-3)(x+3)

d)x²-16=x²-4²=(x-4)(x+4)

e)x²-25 = x²-5²= (x-5)(x+5)

f)=(x-6)(x+6)

g)=(x-7)(x+7)

h)=(x-9)(x+9)

i)=(x-11)(x+11)

j)=(x-13)(x+13)

k)=(x-19)(x+19)

l) x²-400=x²-20²=(x-20)(x+20)

m)35-a² = ✓35² -a² = (35-a)(35+a)

n) 49-a²=7²-a² = (7-a)(7+a)

p)900-m²=30²-m²=(30-m)(30+m)

q) 625-x²=25²-x²=(25-x)(25+x)

r) = (14-x)(14+x)

s) = (19-x)(19+x)

a)4x²-1 = 2²x²-1 = (2x)²-1 = (2x-2)(2x+1)

b) 25x²- 4 = 5²x²-2²= (5x)²-2²=(5x-2)(5x+2)

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