Question: Let's solve the following linear equation. 4x-8=-5x-26 How to solve: An expression which expresses the relationship of quantity by using an equal sign is called an equality. An equality including letters is called an equation. Th…

Question: Let's factorize the following expressions. ① nx+ny ② x^2+8x+16 ③ x^2+9x+20 ④ x^2-16 How to solve: Expressing a polynomial in the form of a produt os some factors is called "factorize". In ①, because there is common factor n in ea…

Question: Expand the following exressions. ① (x+2)(y+4) ② (x+4)(X+5) ③ (x+7)(x+7) ④ (x+4)(x-4) How to solve: ① can be expanded like this, (x+2)(y+4)=xy+4x+2y+8 ② We expand by using the formula, the quantity x plus a, close quantity, times …